19 files changed, 668 insertions, 497 deletions

diff --git a/primedev/core/convar/convar.cpp b/primedev/core/convar/convar.cpp
index 87a1e159..802c088d 100644
--- a/primedev/core/convar/convar.cpp
+++ b/primedev/core/convar/convar.cpp
@@ -1,7 +1,7 @@
 #include "bits.h"
 #include "cvar.h"
 #include "convar.h"
-#include "core/sourceinterface.h"
+#include "core/tier1.h"
 
 #include <float.h>
 
@@ -35,8 +35,7 @@ ON_DLL_LOAD("engine.dll", ConVar, (CModule module))
 	g_pConVar_Vtable = module.Offset(0x67FD28);
 	g_pIConVar_Vtable = module.Offset(0x67FDC8);
 
-	g_pCVarInterface = new SourceInterface<CCvar>("vstdlib.dll", "VEngineCvar007");
-	g_pCVar = *g_pCVarInterface;
+	g_pCVar = Sys_GetFactoryPtr("vstdlib.dll", "VEngineCvar007").RCast<CCvar*>();
 }
 
 //-----------------------------------------------------------------------------
diff --git a/primedev/core/convar/convar.h b/primedev/core/convar/convar.h
index f0366b46..33a50c1c 100644
--- a/primedev/core/convar/convar.h
+++ b/primedev/core/convar/convar.h
@@ -1,5 +1,4 @@
 #pragma once
-#include "core/sourceinterface.h"
 #include "core/math/color.h"
 #include "cvar.h"
 #include "concommand.h"
diff --git a/primedev/core/convar/cvar.cpp b/primedev/core/convar/cvar.cpp
index aa5f0365..78da1ad2 100644
--- a/primedev/core/convar/cvar.cpp
+++ b/primedev/core/convar/cvar.cpp
@@ -22,5 +22,4 @@ std::unordered_map<std::string, ConCommandBase*> CCvar::DumpToMap()
 	return allConVars;
 }
 
-SourceInterface<CCvar>* g_pCVarInterface;
 CCvar* g_pCVar;
diff --git a/primedev/core/convar/cvar.h b/primedev/core/convar/cvar.h
index beaa84f4..024f2b87 100644
--- a/primedev/core/convar/cvar.h
+++ b/primedev/core/convar/cvar.h
@@ -34,5 +34,4 @@ public:
 	std::unordered_map<std::string, ConCommandBase*> DumpToMap();
 };
 
-extern SourceInterface<CCvar>* g_pCVarInterface;
 extern CCvar* g_pCVar;
diff --git a/primedev/core/filesystem/filesystem.cpp b/primedev/core/filesystem/filesystem.cpp
index b39939e4..3c711e8e 100644
--- a/primedev/core/filesystem/filesystem.cpp
+++ b/primedev/core/filesystem/filesystem.cpp
@@ -1,34 +1,32 @@
 #include "filesystem.h"
-#include "core/sourceinterface.h"
+#include "core/tier1.h"
 #include "mods/modmanager.h"
 
 #include <iostream>
 #include <sstream>
 
-AUTOHOOK_INIT()
-
 bool bReadingOriginalFile = false;
 std::string sCurrentModPath;
 
 ConVar* Cvar_ns_fs_log_reads;
 
-SourceInterface<IFileSystem>* g_pFilesystem;
+IFileSystem* g_pFilesystem;
 
 std::string ReadVPKFile(const char* path)
 {
 	// read scripts.rson file, todo: check if this can be overwritten
-	FileHandle_t fileHandle = (*g_pFilesystem)->m_vtable2->Open(&(*g_pFilesystem)->m_vtable2, path, "rb", "GAME", 0);
+	FileHandle_t fileHandle = g_pFilesystem->m_vtable2->Open(&g_pFilesystem->m_vtable2, path, "rb", "GAME", 0);
 
 	std::stringstream fileStream;
 	int bytesRead = 0;
 	char data[4096];
 	do
 	{
-		bytesRead = (*g_pFilesystem)->m_vtable2->Read(&(*g_pFilesystem)->m_vtable2, data, (int)std::size(data), fileHandle);
+		bytesRead = g_pFilesystem->m_vtable2->Read(&g_pFilesystem->m_vtable2, data, (int)std::size(data), fileHandle);
 		fileStream.write(data, bytesRead);
 	} while (bytesRead == std::size(data));
 
-	(*g_pFilesystem)->m_vtable2->Close(*g_pFilesystem, fileHandle);
+	g_pFilesystem->m_vtable2->Close(g_pFilesystem, fileHandle);
 
 	return fileStream.str();
 }
@@ -44,18 +42,17 @@ std::string ReadVPKOriginalFile(const char* path)
 	return ret;
 }
 
-// clang-format off
-HOOK(AddSearchPathHook, AddSearchPath,
-void, __fastcall, (IFileSystem * fileSystem, const char* pPath, const char* pathID, SearchPathAdd_t addType))
-// clang-format on
+static void(__fastcall* o_pAddSearchPath)(IFileSystem* fileSystem, const char* pPath, const char* pathID, SearchPathAdd_t addType) =
+	nullptr;
+static void __fastcall h_AddSearchPath(IFileSystem* fileSystem, const char* pPath, const char* pathID, SearchPathAdd_t addType)
 {
-	AddSearchPath(fileSystem, pPath, pathID, addType);
+	o_pAddSearchPath(fileSystem, pPath, pathID, addType);
 
 	// make sure current mod paths are at head
 	if (!strcmp(pathID, "GAME") && sCurrentModPath.compare(pPath) && addType == PATH_ADD_TO_HEAD)
 	{
-		AddSearchPath(fileSystem, sCurrentModPath.c_str(), "GAME", PATH_ADD_TO_HEAD);
-		AddSearchPath(fileSystem, GetCompiledAssetsPath().string().c_str(), "GAME", PATH_ADD_TO_HEAD);
+		o_pAddSearchPath(fileSystem, sCurrentModPath.c_str(), "GAME", PATH_ADD_TO_HEAD);
+		o_pAddSearchPath(fileSystem, GetCompiledAssetsPath().string().c_str(), "GAME", PATH_ADD_TO_HEAD);
 	}
 }
 
@@ -67,13 +64,13 @@ void SetNewModSearchPaths(Mod* mod)
 	{
 		if ((fs::absolute(mod->m_ModDirectory) / MOD_OVERRIDE_DIR).string().compare(sCurrentModPath))
 		{
-			AddSearchPath(
-				&*(*g_pFilesystem), (fs::absolute(mod->m_ModDirectory) / MOD_OVERRIDE_DIR).string().c_str(), "GAME", PATH_ADD_TO_HEAD);
+			o_pAddSearchPath(
+				g_pFilesystem, (fs::absolute(mod->m_ModDirectory) / MOD_OVERRIDE_DIR).string().c_str(), "GAME", PATH_ADD_TO_HEAD);
 			sCurrentModPath = (fs::absolute(mod->m_ModDirectory) / MOD_OVERRIDE_DIR).string();
 		}
 	}
 	else // push compiled to head
-		AddSearchPath(&*(*g_pFilesystem), fs::absolute(GetCompiledAssetsPath()).string().c_str(), "GAME", PATH_ADD_TO_HEAD);
+		o_pAddSearchPath(g_pFilesystem, fs::absolute(GetCompiledAssetsPath()).string().c_str(), "GAME", PATH_ADD_TO_HEAD);
 }
 
 bool TryReplaceFile(const char* pPath, bool shouldCompile)
@@ -97,22 +94,17 @@ bool TryReplaceFile(const char* pPath, bool shouldCompile)
 }
 
 // force modded files to be read from mods, not cache
-// clang-format off
-HOOK(ReadFromCacheHook, ReadFromCache,
-bool, __fastcall, (IFileSystem * filesystem, char* pPath, void* result))
-// clang-format off
+static bool(__fastcall* o_pReadFromCache)(IFileSystem* filesystem, char* pPath, void* result) = nullptr;
+static bool __fastcall h_ReadFromCache(IFileSystem* filesystem, char* pPath, void* result)
 {
 	if (TryReplaceFile(pPath, true))
 		return false;
 
-	return ReadFromCache(filesystem, pPath, result);
+	return o_pReadFromCache(filesystem, pPath, result);
 }
 
-// force modded files to be read from mods, not vpk
-// clang-format off
-AUTOHOOK(ReadFileFromVPK, filesystem_stdio.dll + 0x5CBA0,
-FileHandle_t, __fastcall, (VPKData* vpkInfo, uint64_t* b, char* filename))
-// clang-format on
+static FileHandle_t(__fastcall* o_pReadFileFromVPK)(VPKData* vpkInfo, uint64_t* b, char* filename) = nullptr;
+static FileHandle_t __fastcall h_ReadFileFromVPK(VPKData* vpkInfo, uint64_t* b, char* filename)
 {
 	// don't compile here because this is only ever called from OpenEx, which already compiles
 	if (TryReplaceFile(filename, false))
@@ -121,22 +113,24 @@ FileHandle_t, __fastcall, (VPKData* vpkInfo, uint64_t* b, char* filename))
 		return b;
 	}
 
-	return ReadFileFromVPK(vpkInfo, b, filename);
+	return o_pReadFileFromVPK(vpkInfo, b, filename);
 }
 
-// clang-format off
-AUTOHOOK(CBaseFileSystem__OpenEx, filesystem_stdio.dll + 0x15F50,
-FileHandle_t, __fastcall, (IFileSystem* filesystem, const char* pPath, const char* pOptions, uint32_t flags, const char* pPathID, char **ppszResolvedFilename))
-// clang-format on
+static FileHandle_t(__fastcall* o_pCBaseFileSystem__OpenEx)(
+	IFileSystem* filesystem, const char* pPath, const char* pOptions, uint32_t flags, const char* pPathID, char** ppszResolvedFilename) =
+	nullptr;
+static FileHandle_t __fastcall h_CBaseFileSystem__OpenEx(
+	IFileSystem* filesystem, const char* pPath, const char* pOptions, uint32_t flags, const char* pPathID, char** ppszResolvedFilename)
 {
 	TryReplaceFile(pPath, true);
-	return CBaseFileSystem__OpenEx(filesystem, pPath, pOptions, flags, pPathID, ppszResolvedFilename);
+	return o_pCBaseFileSystem__OpenEx(filesystem, pPath, pOptions, flags, pPathID, ppszResolvedFilename);
 }
 
-HOOK(MountVPKHook, MountVPK, VPKData*, , (IFileSystem * fileSystem, const char* pVpkPath))
+static VPKData* (*o_pMountVPK)(IFileSystem* fileSystem, const char* pVpkPath) = nullptr;
+static VPKData* h_MountVPK(IFileSystem* fileSystem, const char* pVpkPath)
 {
 	NS::log::fs->info("MountVPK {}", pVpkPath);
-	VPKData* ret = MountVPK(fileSystem, pVpkPath);
+	VPKData* ret = o_pMountVPK(fileSystem, pVpkPath);
 
 	for (Mod mod : g_pModManager->m_LoadedMods)
 	{
@@ -156,7 +150,7 @@ HOOK(MountVPKHook, MountVPK, VPKData*, , (IFileSystem * fileSystem, const char*
 					continue;
 			}
 
-			VPKData* loaded = MountVPK(fileSystem, vpkEntry.m_sVpkPath.c_str());
+			VPKData* loaded = o_pMountVPK(fileSystem, vpkEntry.m_sVpkPath.c_str());
 			if (!ret) // this is primarily for map vpks and stuff, so the map's vpk is what gets returned from here
 				ret = loaded;
 		}
@@ -167,11 +161,18 @@ HOOK(MountVPKHook, MountVPK, VPKData*, , (IFileSystem * fileSystem, const char*
 
 ON_DLL_LOAD("filesystem_stdio.dll", Filesystem, (CModule module))
 {
-	AUTOHOOK_DISPATCH()
+	o_pReadFileFromVPK = module.Offset(0x5CBA0).RCast<decltype(o_pReadFileFromVPK)>();
+	HookAttach(&(PVOID&)o_pReadFileFromVPK, (PVOID)h_ReadFileFromVPK);
+
+	o_pCBaseFileSystem__OpenEx = module.Offset(0x15F50).RCast<decltype(o_pCBaseFileSystem__OpenEx)>();
+	HookAttach(&(PVOID&)o_pCBaseFileSystem__OpenEx, (PVOID)h_CBaseFileSystem__OpenEx);
 
-	g_pFilesystem = new SourceInterface<IFileSystem>("filesystem_stdio.dll", "VFileSystem017");
+	g_pFilesystem = Sys_GetFactoryPtr("filesystem_stdio.dll", "VFileSystem017").RCast<IFileSystem*>();
 
-	AddSearchPathHook.Dispatch((LPVOID)(*g_pFilesystem)->m_vtable->AddSearchPath);
-	ReadFromCacheHook.Dispatch((LPVOID)(*g_pFilesystem)->m_vtable->ReadFromCache);
-	MountVPKHook.Dispatch((LPVOID)(*g_pFilesystem)->m_vtable->MountVPK);
+	o_pAddSearchPath = reinterpret_cast<decltype(o_pAddSearchPath)>(g_pFilesystem->m_vtable->AddSearchPath);
+	HookAttach(&(PVOID&)o_pAddSearchPath, (PVOID)h_AddSearchPath);
+	o_pReadFromCache = reinterpret_cast<decltype(o_pReadFromCache)>(g_pFilesystem->m_vtable->ReadFromCache);
+	HookAttach(&(PVOID&)o_pReadFromCache, (PVOID)h_ReadFromCache);
+	o_pMountVPK = reinterpret_cast<decltype(o_pMountVPK)>(g_pFilesystem->m_vtable->MountVPK);
+	HookAttach(&(PVOID&)o_pMountVPK, (PVOID)h_MountVPK);
 }
diff --git a/primedev/core/filesystem/filesystem.h b/primedev/core/filesystem/filesystem.h
index 4e2c18d9..2c592b3f 100644
--- a/primedev/core/filesystem/filesystem.h
+++ b/primedev/core/filesystem/filesystem.h
@@ -1,5 +1,4 @@
 #pragma once
-#include "core/sourceinterface.h"
 
 // taken from ttf2sdk
 typedef void* FileHandle_t;
@@ -48,7 +47,7 @@ public:
 	VTable2* m_vtable2;
 };
 
-extern SourceInterface<IFileSystem>* g_pFilesystem;
+extern IFileSystem* g_pFilesystem;
 
 std::string ReadVPKFile(const char* path);
 std::string ReadVPKOriginalFile(const char* path);
diff --git a/primedev/core/filesystem/rpakfilesystem.cpp b/primedev/core/filesystem/rpakfilesystem.cpp
index da72646b..c3e5e74e 100644
--- a/primedev/core/filesystem/rpakfilesystem.cpp
+++ b/primedev/core/filesystem/rpakfilesystem.cpp
@@ -2,206 +2,447 @@
 #include "mods/modmanager.h"
 #include "dedicated/dedicated.h"
 #include "core/tier0.h"
+#include "util/utils.h"
 
-AUTOHOOK_INIT()
-
-// there are more i'm just too lazy to add
+#pragma pack(push, 1)
 struct PakLoadFuncs
 {
-	void* unk0[3];
-	int (*LoadPakAsync)(const char* pPath, void* unknownSingleton, int flags, void* callback0, void* callback1);
-	void* unk1[2];
-	void* (*UnloadPak)(int iPakHandle, void* callback);
-	void* unk2[6];
-	void* (*LoadFile)(const char* path); // unsure
-	void* unk3[10];
-	void* (*ReadFileAsync)(const char* pPath, void* a2);
+	void (*InitRpakSystem)();
+	void (*AddAssetLoaderWithJobDetails)(/*assetTypeHeader*/ void*, uint32_t, int);
+	void (*AddAssetLoader)(/*assetTypeHeader*/ void*);
+	PakHandle (*LoadRpakFileAsync)(const char* pPath, void* allocator, int flags);
+	void (*LoadRpakFile)(const char*, __int64(__fastcall*)(), __int64, void(__cdecl*)());
+	__int64 qword28;
+	void (*UnloadPak)(PakHandle iPakHandle, void* callback);
+	__int64 qword38;
+	__int64 qword40;
+	__int64 qword48;
+	__int64 qword50;
+	FARPROC (*GetDllCallback)(__int16 a1, const CHAR* a2);
+	__int64 (*GetAssetByHash)(__int64 hash);
+	__int64 (*GetAssetByName)(const char* a1);
+	__int64 qword70;
+	__int64 qword78;
+	__int64 qword80;
+	__int64 qword88;
+	__int64 qword90;
+	__int64 qword98;
+	__int64 qwordA0;
+	__int64 qwordA8;
+	__int64 qwordB0;
+	__int64 qwordBB;
+	void* (*OpenFile)(const char* pPath);
+	__int64 CloseFile;
+	__int64 qwordD0;
+	__int64 FileReadAsync;
+	__int64 ComplexFileReadAsync;
+	__int64 GetReadJobState;
+	__int64 WaitForFileReadJobComplete;
+	__int64 CancelFileReadJob;
+	__int64 CancelFileReadJobAsync;
+	__int64 qword108;
 };
+static_assert(sizeof(PakLoadFuncs) == 0x110);
+#pragma pack(pop)
 
 PakLoadFuncs* g_pakLoadApi;
-
 PakLoadManager* g_pPakLoadManager;
-void** pUnknownPakLoadSingleton;
 
-int PakLoadManager::LoadPakAsync(const char* pPath, const ePakLoadSource nLoadSource)
+static char* pszCurrentMapRpakPath = nullptr;
+static PakHandle* piCurrentMapRpakHandle = nullptr;
+static PakHandle* piCurrentMapPatchRpakHandle = nullptr;
+static /*CModelLoader*/ void** ppModelLoader = nullptr;
+static void** rpakMemoryAllocator = nullptr;
+
+static __int64 (*o_pLoadGametypeSpecificRpaks)(const char* levelName) = nullptr;
+static __int64 (**o_pCleanMaterialSystemStuff)() = nullptr;
+static __int64 (**o_pCModelLoader_UnreferenceAllModels)(/*CModelLoader*/ void* a1) = nullptr;
+static char* (*o_pLoadlevelLoadscreen)(const char* levelName) = nullptr;
+static unsigned int (*o_pGetPakPatchNumber)(const char* pPakPath) = nullptr;
+
+// Marks all mod Paks to be unloaded on next map load.
+// Also cleans up any mod Paks that are already unloaded.
+void PakLoadManager::UnloadAllModPaks()
 {
-	int nHandle = g_pakLoadApi->LoadPakAsync(pPath, *pUnknownPakLoadSingleton, 2, nullptr, nullptr);
-
-	// set the load source of the pak we just loaded
-	if (nHandle != -1)
-		GetPakInfo(nHandle)->m_nLoadSource = nLoadSource;
-
-	return nHandle;
+	NS::log::rpak->info("Reloading RPaks on next map load...");
+	for (auto& modPak : m_modPaks)
+	{
+		modPak.m_markedForDelete = true;
+	}
+	// clean up any paks that are both marked for unload and already unloaded
+	CleanUpUnloadedPaks();
+	SetForceReloadOnMapLoad(true);
 }
 
-void PakLoadManager::UnloadPak(const int nPakHandle)
+// Tracks all Paks related to a mod.
+void PakLoadManager::TrackModPaks(Mod& mod)
 {
-	g_pakLoadApi->UnloadPak(nPakHandle, nullptr);
+	const fs::path modPakPath("./" / mod.m_ModDirectory / "paks");
+
+	for (auto& modRpakEntry : mod.Rpaks)
+	{
+		ModPak_t pak;
+		pak.m_modName = mod.Name;
+		pak.m_path = (modPakPath / modRpakEntry.m_pakName).string();
+		pak.m_pathHash = STR_HASH(pak.m_path);
+
+		pak.m_preload = modRpakEntry.m_preload;
+		pak.m_dependentPakHash = modRpakEntry.m_dependentPakHash;
+		pak.m_mapRegex = modRpakEntry.m_loadRegex;
+
+		m_modPaks.push_back(pak);
+	}
 }
 
-void PakLoadManager::UnloadMapPaks()
+// Untracks all paks that aren't currently loaded and are marked for unload.
+void PakLoadManager::CleanUpUnloadedPaks()
 {
-	for (auto& pair : m_vLoadedPaks)
-		if (pair.second.m_nLoadSource == ePakLoadSource::MAP)
-			UnloadPak(pair.first);
+	auto fnRemovePredicate = [](ModPak_t& pak) -> bool { return pak.m_markedForDelete && pak.m_handle == PakHandle::INVALID; };
+
+	m_modPaks.erase(std::remove_if(m_modPaks.begin(), m_modPaks.end(), fnRemovePredicate), m_modPaks.end());
 }
 
-LoadedPak* PakLoadManager::TrackLoadedPak(ePakLoadSource nLoadSource, int nPakHandle, size_t nPakNameHash)
+// Unloads all paks that are marked for unload.
+void PakLoadManager::UnloadMarkedPaks()
 {
-	LoadedPak pak;
-	pak.m_nLoadSource = nLoadSource;
-	pak.m_nPakHandle = nPakHandle;
-	pak.m_nPakNameHash = nPakNameHash;
+	++m_reentranceCounter;
+	const ScopeGuard guard([&]() { --m_reentranceCounter; });
+
+	(*o_pCModelLoader_UnreferenceAllModels)(*ppModelLoader);
+	(*o_pCleanMaterialSystemStuff)();
+
+	for (auto& modPak : m_modPaks)
+	{
+		if (modPak.m_handle == PakHandle::INVALID || !modPak.m_markedForDelete)
+			continue;
 
-	m_vLoadedPaks.insert(std::make_pair(nPakHandle, pak));
-	return &m_vLoadedPaks.at(nPakHandle);
+		g_pakLoadApi->UnloadPak(modPak.m_handle, *o_pCleanMaterialSystemStuff);
+		modPak.m_handle = PakHandle::INVALID;
+	}
 }
 
-void PakLoadManager::RemoveLoadedPak(int nPakHandle)
+// Loads all modded paks for the given map.
+void PakLoadManager::LoadModPaksForMap(const char* mapName)
 {
-	m_vLoadedPaks.erase(nPakHandle);
+	++m_reentranceCounter;
+	const ScopeGuard guard([&]() { --m_reentranceCounter; });
+
+	for (auto& modPak : m_modPaks)
+	{
+		// don't load paks that are already loaded
+		if (modPak.m_handle != PakHandle::INVALID)
+			continue;
+		std::cmatch matches;
+		if (!std::regex_match(mapName, matches, modPak.m_mapRegex))
+			continue;
+
+		modPak.m_handle = g_pakLoadApi->LoadRpakFileAsync(modPak.m_path.c_str(), *rpakMemoryAllocator, 7);
+		m_mapPaks.push_back(modPak.m_pathHash);
+	}
 }
 
-LoadedPak* PakLoadManager::GetPakInfo(const int nPakHandle)
+// Unloads all modded map paks.
+void PakLoadManager::UnloadModPaks()
 {
-	return &m_vLoadedPaks.at(nPakHandle);
+	++m_reentranceCounter;
+	const ScopeGuard guard([&]() { --m_reentranceCounter; });
+
+	(*o_pCModelLoader_UnreferenceAllModels)(*ppModelLoader);
+	(*o_pCleanMaterialSystemStuff)();
+
+	for (auto& modPak : m_modPaks)
+	{
+		for (auto it = m_mapPaks.begin(); it != m_mapPaks.end(); ++it)
+		{
+			if (*it != modPak.m_pathHash)
+				continue;
+
+			m_mapPaks.erase(it, it + 1);
+			g_pakLoadApi->UnloadPak(modPak.m_handle, *o_pCleanMaterialSystemStuff);
+			modPak.m_handle = PakHandle::INVALID;
+			break;
+		}
+	}
+
+	// If this has happened, we may have leaked a pak?
+	// It basically means that none of the entries in m_modPaks matched the hash in m_mapPaks so we didn't end up unloading it
+	assert_msg(m_mapPaks.size() == 0, "Not all map paks were unloaded?");
 }
 
-int PakLoadManager::GetPakHandle(const size_t nPakNameHash)
+// Called after a Pak was loaded.
+void PakLoadManager::OnPakLoaded(std::string& originalPath, std::string& resultingPath, PakHandle resultingHandle)
 {
-	for (auto& pair : m_vLoadedPaks)
-		if (pair.second.m_nPakNameHash == nPakNameHash)
-			return pair.first;
+	if (IsVanillaCall())
+	{
+		// add entry to loaded vanilla rpaks
+		m_vanillaPaks.emplace_back(originalPath, resultingHandle);
+	}
 
-	return -1;
+	LoadDependentPaks(resultingPath, resultingHandle);
 }
 
-int PakLoadManager::GetPakHandle(const char* pPath)
+// Called before a Pak was unloaded.
+void PakLoadManager::OnPakUnloading(PakHandle handle)
 {
-	return GetPakHandle(STR_HASH(pPath));
+	UnloadDependentPaks(handle);
+
+	if (IsVanillaCall())
+	{
+		// remove entry from loaded vanilla rpaks
+		auto fnRemovePredicate = [handle](std::pair<std::string, PakHandle>& pair) -> bool { return pair.second == handle; };
+
+		m_vanillaPaks.erase(std::remove_if(m_vanillaPaks.begin(), m_vanillaPaks.end(), fnRemovePredicate), m_vanillaPaks.end());
+
+		// no need to handle aliasing here, if vanilla wants it gone, it's gone
+	}
+	else
+	{
+		// note: aliasing is handled the old way, long term todo: move it over to the PakLoadManager
+		// handle the potential unloading of an aliased vanilla rpak (we aliased it, and we are now unloading the alias, so we should load
+		// the vanilla one again)
+		// for (auto& [path, resultingHandle] : m_vanillaPaks)
+		//{
+		//	if (resultingHandle != handle)
+		//		continue;
+
+		//	// load vanilla rpak
+		//}
+	}
+
+	// set handle of the mod pak (if any) that has this handle for proper tracking
+	for (auto& modPak : m_modPaks)
+	{
+		if (modPak.m_handle == handle)
+			modPak.m_handle = PakHandle::INVALID;
+	}
 }
 
-void* PakLoadManager::LoadFile(const char* path)
+// Whether the vanilla game has this rpak
+static bool VanillaHasPak(const char* pakName)
 {
-	return g_pakLoadApi->LoadFile(path);
+	fs::path originalPath = fs::path("./r2/paks/Win64") / pakName;
+	unsigned int highestPatch = o_pGetPakPatchNumber(pakName);
+	if (highestPatch)
+	{
+		// add the patch path to the extension
+		char buf[16];
+		snprintf(buf, sizeof(buf), "(%02u).rpak", highestPatch);
+		// remove the .rpak and add the new suffix
+		originalPath = originalPath.replace_extension().string() + buf;
+	}
+	else
+	{
+		originalPath /= pakName;
+	}
+
+	return fs::exists(originalPath);
 }
 
-void HandlePakAliases(char** map)
+// If vanilla doesn't have an rpak for this path, tries to map it to a modded rpak of the same name.
+void PakLoadManager::FixupPakPath(std::string& pakPath)
 {
-	// convert the pak being loaded to it's aliased one, e.g. aliasing mp_hub_timeshift => sp_hub_timeshift
-	for (int64_t i = g_pModManager->m_LoadedMods.size() - 1; i > -1; i--)
+	if (VanillaHasPak(pakPath.c_str()))
+		return;
+
+	for (ModPak_t& modPak : m_modPaks)
 	{
-		Mod* mod = &g_pModManager->m_LoadedMods[i];
-		if (!mod->m_bEnabled)
+		if (modPak.m_markedForDelete)
 			continue;
 
-		if (mod->RpakAliases.find(*map) != mod->RpakAliases.end())
+		fs::path modPakFilename = fs::path(modPak.m_path).filename();
+		if (pakPath == modPakFilename.string())
 		{
-			*map = &mod->RpakAliases[*map][0];
+			pakPath = modPak.m_path;
 			return;
 		}
 	}
 }
 
-void LoadPreloadPaks()
+// Loads all "Preload" Paks. todo: deprecate Preload.
+void PakLoadManager::LoadPreloadPaks()
 {
-	// note, loading from ./ is necessary otherwise paks will load from gamedir/r2/paks
-	for (Mod& mod : g_pModManager->m_LoadedMods)
+	++m_reentranceCounter;
+	const ScopeGuard guard([&]() { --m_reentranceCounter; });
+
+	for (auto& modPak : m_modPaks)
 	{
-		if (!mod.m_bEnabled)
+		if (modPak.m_markedForDelete || modPak.m_handle != PakHandle::INVALID || !modPak.m_preload)
 			continue;
 
-		// need to get a relative path of mod to mod folder
-		fs::path modPakPath("./" / mod.m_ModDirectory / "paks");
+		modPak.m_handle = g_pakLoadApi->LoadRpakFileAsync(modPak.m_path.c_str(), *rpakMemoryAllocator, 7);
+	}
+}
 
-		for (ModRpakEntry& pak : mod.Rpaks)
-			if (pak.m_bAutoLoad)
-				g_pPakLoadManager->LoadPakAsync((modPakPath / pak.m_sPakName).string().c_str(), ePakLoadSource::CONSTANT);
+// Causes all "Postload" paks to be loaded again.
+void PakLoadManager::ReloadPostloadPaks()
+{
+	++m_reentranceCounter;
+	const ScopeGuard guard([&]() { --m_reentranceCounter; });
+
+	// pretend that we just loaded all of these vanilla paks
+	for (auto& [path, handle] : m_vanillaPaks)
+	{
+		LoadDependentPaks(path, handle);
 	}
 }
 
-void LoadPostloadPaks(const char* pPath)
+// Wrapper for Pak load API.
+void* PakLoadManager::OpenFile(const char* path)
 {
-	// note, loading from ./ is necessary otherwise paks will load from gamedir/r2/paks
-	for (Mod& mod : g_pModManager->m_LoadedMods)
+	return g_pakLoadApi->OpenFile(path);
+}
+
+// Loads Paks that depend on this Pak.
+void PakLoadManager::LoadDependentPaks(std::string& path, PakHandle handle)
+{
+	++m_reentranceCounter;
+	const ScopeGuard guard([&]() { --m_reentranceCounter; });
+
+	const size_t hash = STR_HASH(path);
+	for (auto& modPak : m_modPaks)
 	{
-		if (!mod.m_bEnabled)
+		if (modPak.m_handle != PakHandle::INVALID)
+			continue;
+		if (modPak.m_dependentPakHash != hash)
 			continue;
 
-		// need to get a relative path of mod to mod folder
-		fs::path modPakPath("./" / mod.m_ModDirectory / "paks");
-
-		for (ModRpakEntry& pak : mod.Rpaks)
-			if (pak.m_sLoadAfterPak == pPath)
-				g_pPakLoadManager->LoadPakAsync((modPakPath / pak.m_sPakName).string().c_str(), ePakLoadSource::CONSTANT);
+		// load pak
+		modPak.m_handle = g_pakLoadApi->LoadRpakFileAsync(modPak.m_path.c_str(), *rpakMemoryAllocator, 7);
+		m_dependentPaks.emplace_back(handle, hash);
 	}
 }
 
-void LoadCustomMapPaks(char** pakName, bool* bNeedToFreePakName)
+// Unloads Paks that depend on this Pak.
+void PakLoadManager::UnloadDependentPaks(PakHandle handle)
 {
-	// whether the vanilla game has this rpak
-	bool bHasOriginalPak = fs::exists(fs::path("r2/paks/Win64/") / *pakName);
+	++m_reentranceCounter;
+	const ScopeGuard guard([&]() { --m_reentranceCounter; });
 
-	// note, loading from ./ is necessary otherwise paks will load from gamedir/r2/paks
-	for (Mod& mod : g_pModManager->m_LoadedMods)
+	auto fnRemovePredicate = [&](std::pair<PakHandle, size_t>& pair) -> bool
 	{
-		if (!mod.m_bEnabled)
-			continue;
+		if (pair.first != handle)
+			return false;
 
-		// need to get a relative path of mod to mod folder
-		fs::path modPakPath("./" / mod.m_ModDirectory / "paks");
+		for (auto& modPak : m_modPaks)
+		{
+			if (modPak.m_pathHash != pair.second || modPak.m_handle == PakHandle::INVALID)
+				continue;
 
-		for (ModRpakEntry& pak : mod.Rpaks)
+			// unload pak
+			g_pakLoadApi->UnloadPak(modPak.m_handle, *o_pCleanMaterialSystemStuff);
+			modPak.m_handle = PakHandle::INVALID;
+		}
+
+		return true;
+	};
+	m_dependentPaks.erase(std::remove_if(m_dependentPaks.begin(), m_dependentPaks.end(), fnRemovePredicate), m_dependentPaks.end());
+}
+
+// Handles aliases for rpaks defined in rpak.json, effectively redirecting an rpak load to a different path.
+static void HandlePakAliases(std::string& originalPath)
+{
+	// convert the pak being loaded to its aliased one, e.g. aliasing mp_hub_timeshift => sp_hub_timeshift
+	for (int64_t i = g_pModManager->m_LoadedMods.size() - 1; i > -1; i--)
+	{
+		Mod* mod = &g_pModManager->m_LoadedMods[i];
+		if (!mod->m_bEnabled)
+			continue;
+
+		if (mod->RpakAliases.find(originalPath) != mod->RpakAliases.end())
 		{
-			if (!pak.m_bAutoLoad && !pak.m_sPakName.compare(*pakName))
-			{
-				// if the game doesn't have the original pak, let it handle loading this one as if it was the one it was loading originally
-				if (!bHasOriginalPak)
-				{
-					std::string path = (modPakPath / pak.m_sPakName).string();
-					*pakName = new char[path.size() + 1];
-					strcpy(*pakName, &path[0]);
-					(*pakName)[path.size()] = '\0';
-
-					bHasOriginalPak = true;
-					*bNeedToFreePakName =
-						true; // we can't free this memory until we're done with the pak, so let whatever's calling this deal with it
-				}
-				else
-					g_pPakLoadManager->LoadPakAsync((modPakPath / pak.m_sPakName).string().c_str(), ePakLoadSource::MAP);
-			}
+			originalPath = mod->RpakAliases[originalPath];
+			return;
 		}
 	}
 }
 
-// clang-format off
-HOOK(LoadPakAsyncHook, LoadPakAsync,
-int, __fastcall, (char* pPath, void* unknownSingleton, int flags, void* pCallback0, void* pCallback1))
-// clang-format on
+/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+
+static bool (*o_pLoadMapRpaks)(char* mapPath) = nullptr;
+static bool h_LoadMapRpaks(char* mapPath)
 {
-	HandlePakAliases(&pPath);
+	// unload all mod rpaks that are marked for unload
+	g_pPakLoadManager->UnloadMarkedPaks();
+	g_pPakLoadManager->CleanUpUnloadedPaks();
+
+	// strip file extension
+	const std::string mapName = fs::path(mapPath).replace_extension().string();
+
+	// load mp_common, sp_common etc.
+	o_pLoadGametypeSpecificRpaks(mapName.c_str());
 
-	// dont load the pak if it's currently loaded already
-	size_t nPathHash = STR_HASH(pPath);
-	if (g_pPakLoadManager->GetPakHandle(nPathHash) != -1)
-		return -1;
+	// unload old modded map paks
+	g_pPakLoadManager->UnloadModPaks();
+	// load modded map paks
+	g_pPakLoadManager->LoadModPaksForMap(mapName.c_str());
 
-	bool bNeedToFreePakName = false;
+	// don't load/unload anything when going to the lobby, presumably to save load times when going back to the same map
+	if (!g_pPakLoadManager->GetForceReloadOnMapLoad() && !strcmp("mp_lobby", mapName.c_str()))
+		return false;
 
-	static bool bShouldLoadPaks = true;
-	if (bShouldLoadPaks)
+	if (g_pPakLoadManager->GetForceReloadOnMapLoad())
 	{
-		// make a copy of the path for comparing to determine whether we should load this pak on dedi, before it could get overwritten by
-		// LoadCustomMapPaks
-		std::string originalPath(pPath);
+		g_pPakLoadManager->LoadPreloadPaks();
+		g_pPakLoadManager->ReloadPostloadPaks();
+	}
+
+	char mapRpakStr[272];
+	snprintf(mapRpakStr, 272, "%s.rpak", mapName.c_str());
+
+	// if level being loaded is the same as current level, do nothing
+	if (!g_pPakLoadManager->GetForceReloadOnMapLoad() && !strcmp(mapRpakStr, pszCurrentMapRpakPath))
+		return true;
+
+	strcpy(pszCurrentMapRpakPath, mapRpakStr);
 
-		// disable preloading while we're doing this
-		bShouldLoadPaks = false;
+	(*o_pCleanMaterialSystemStuff)();
+	o_pLoadlevelLoadscreen(mapName.c_str());
 
-		LoadPreloadPaks();
-		LoadCustomMapPaks(&pPath, &bNeedToFreePakName);
+	// unload old map rpaks
+	PakHandle curHandle = *piCurrentMapRpakHandle;
+	PakHandle curPatchHandle = *piCurrentMapPatchRpakHandle;
+	if (curHandle != PakHandle::INVALID)
+	{
+		(*o_pCModelLoader_UnreferenceAllModels)(*ppModelLoader);
+		(*o_pCleanMaterialSystemStuff)();
+		g_pakLoadApi->UnloadPak(curHandle, *o_pCleanMaterialSystemStuff);
+		*piCurrentMapRpakHandle = PakHandle::INVALID;
+	}
+	if (curPatchHandle != PakHandle::INVALID)
+	{
+		(*o_pCModelLoader_UnreferenceAllModels)(*ppModelLoader);
+		(*o_pCleanMaterialSystemStuff)();
+		g_pakLoadApi->UnloadPak(curPatchHandle, *o_pCleanMaterialSystemStuff);
+		*piCurrentMapPatchRpakHandle = PakHandle::INVALID;
+	}
 
-		bShouldLoadPaks = true;
+	*piCurrentMapRpakHandle = g_pakLoadApi->LoadRpakFileAsync(mapRpakStr, *rpakMemoryAllocator, 7);
+
+	// load special _patch rpak (seemingly used for dev things?)
+	char levelPatchRpakStr[272];
+	snprintf(levelPatchRpakStr, 272, "%s_patch.rpak", mapName.c_str());
+	*piCurrentMapPatchRpakHandle = g_pakLoadApi->LoadRpakFileAsync(levelPatchRpakStr, *rpakMemoryAllocator, 7);
+
+	// we just reloaded the paks, so we don't need to force it again
+	g_pPakLoadManager->SetForceReloadOnMapLoad(false);
+	return true;
+}
+
+// clang-format off
+HOOK(LoadPakAsyncHook, LoadPakAsync,
+PakHandle, __fastcall, (const char* pPath, void* memoryAllocator, int flags))
+// clang-format on
+{
+	// make a copy of the path for comparing to determine whether we should load this pak on dedi, before it could get overwritten
+	std::string svOriginalPath(pPath);
+
+	std::string resultingPath(pPath);
+	HandlePakAliases(resultingPath);
+
+	if (g_pPakLoadManager->IsVanillaCall())
+	{
+		g_pPakLoadManager->LoadPreloadPaks();
+		g_pPakLoadManager->FixupPakPath(resultingPath);
 
 		// do this after custom paks load and in bShouldLoadPaks so we only ever call this on the root pakload call
 		// todo: could probably add some way to flag custom paks to not be loaded on dedicated servers in rpak.json
@@ -210,44 +451,27 @@ int, __fastcall, (char* pPath, void* unknownSingleton, int flags, void* pCallbac
 		// sp_<map> rpaks contain tutorial ghost data
 		// sucks to have to load the entire rpak for that but sp was never meant to be done on dedi
 		if (IsDedicatedServer() &&
-			(CommandLine()->CheckParm("-nopakdedi") || strncmp(&originalPath[0], "common", 6) && strncmp(&originalPath[0], "sp_", 3)))
+			(CommandLine()->CheckParm("-nopakdedi") || strncmp(&svOriginalPath[0], "common", 6) && strncmp(&svOriginalPath[0], "sp_", 3)))
 		{
-			if (bNeedToFreePakName)
-				delete[] pPath;
-
-			NS::log::rpak->info("Not loading pak {} for dedicated server", originalPath);
-			return -1;
+			NS::log::rpak->info("Not loading pak {} for dedicated server", svOriginalPath);
+			return PakHandle::INVALID;
 		}
 	}
 
-	int iPakHandle = LoadPakAsync(pPath, unknownSingleton, flags, pCallback0, pCallback1);
-	NS::log::rpak->info("LoadPakAsync {} {}", pPath, iPakHandle);
-
-	// trak the pak
-	g_pPakLoadManager->TrackLoadedPak(ePakLoadSource::UNTRACKED, iPakHandle, nPathHash);
-	LoadPostloadPaks(pPath);
+	PakHandle iPakHandle = LoadPakAsync(resultingPath.c_str(), memoryAllocator, flags);
+	NS::log::rpak->info("LoadPakAsync {} {}", resultingPath, iPakHandle);
 
-	if (bNeedToFreePakName)
-		delete[] pPath;
+	g_pPakLoadManager->OnPakLoaded(svOriginalPath, resultingPath, iPakHandle);
 
 	return iPakHandle;
 }
 
 // clang-format off
 HOOK(UnloadPakHook, UnloadPak,
-void*, __fastcall, (int nPakHandle, void* pCallback))
+void*, __fastcall, (PakHandle nPakHandle, void* pCallback))
 // clang-format on
 {
-	// stop tracking the pak
-	g_pPakLoadManager->RemoveLoadedPak(nPakHandle);
-
-	static bool bShouldUnloadPaks = true;
-	if (bShouldUnloadPaks)
-	{
-		bShouldUnloadPaks = false;
-		g_pPakLoadManager->UnloadMapPaks();
-		bShouldUnloadPaks = true;
-	}
+	g_pPakLoadManager->OnPakUnloading(nPakHandle);
 
 	NS::log::rpak->info("UnloadPak {}", nPakHandle);
 	return UnloadPak(nPakHandle, pCallback);
@@ -256,7 +480,7 @@ void*, __fastcall, (int nPakHandle, void* pCallback))
 // we hook this exclusively for resolving stbsp paths, but seemingly it's also used for other stuff like vpk, rpak, mprj and starpak loads
 // tbh this actually might be for memory mapped files or something, would make sense i think
 // clang-format off
-HOOK(ReadFileAsyncHook, ReadFileAsync, 
+HOOK(OpenFileHook, o_pOpenFile, 
 void*, __fastcall, (const char* pPath, void* pCallback))
 // clang-format on
 {
@@ -329,19 +553,34 @@ void*, __fastcall, (const char* pPath, void* pCallback))
 		NS::log::rpak->info("LoadStreamPak: {}", filename.string());
 	}
 
-	return ReadFileAsync(pPath, pCallback);
+	return o_pOpenFile(pPath, pCallback);
 }
 
 ON_DLL_LOAD("engine.dll", RpakFilesystem, (CModule module))
 {
-	AUTOHOOK_DISPATCH();
-
 	g_pPakLoadManager = new PakLoadManager;
 
 	g_pakLoadApi = module.Offset(0x5BED78).Deref().RCast<PakLoadFuncs*>();
-	pUnknownPakLoadSingleton = module.Offset(0x7C5E20).RCast<void**>();
 
-	LoadPakAsyncHook.Dispatch((LPVOID*)g_pakLoadApi->LoadPakAsync);
+	LoadPakAsyncHook.Dispatch((LPVOID*)g_pakLoadApi->LoadRpakFileAsync);
 	UnloadPakHook.Dispatch((LPVOID*)g_pakLoadApi->UnloadPak);
-	ReadFileAsyncHook.Dispatch((LPVOID*)g_pakLoadApi->ReadFileAsync);
+	OpenFileHook.Dispatch((LPVOID*)g_pakLoadApi->OpenFile);
+
+	pszCurrentMapRpakPath = module.Offset(0x1315C3E0).RCast<decltype(pszCurrentMapRpakPath)>();
+	piCurrentMapRpakHandle = module.Offset(0x7CB5A0).RCast<decltype(piCurrentMapRpakHandle)>();
+	piCurrentMapPatchRpakHandle = module.Offset(0x7CB5A4).RCast<decltype(piCurrentMapPatchRpakHandle)>();
+	ppModelLoader = module.Offset(0x7C4AC0).RCast<decltype(ppModelLoader)>();
+	rpakMemoryAllocator = module.Offset(0x7C5E20).RCast<decltype(rpakMemoryAllocator)>();
+
+	o_pLoadGametypeSpecificRpaks = module.Offset(0x15AD20).RCast<decltype(o_pLoadGametypeSpecificRpaks)>();
+	o_pCleanMaterialSystemStuff = module.Offset(0x12A11F00).RCast<decltype(o_pCleanMaterialSystemStuff)>();
+	o_pCModelLoader_UnreferenceAllModels = module.Offset(0x5ED580).RCast<decltype(o_pCModelLoader_UnreferenceAllModels)>();
+	o_pLoadlevelLoadscreen = module.Offset(0x15A810).RCast<decltype(o_pLoadlevelLoadscreen)>();
+
+	o_pLoadMapRpaks = module.Offset(0x15A8C0).RCast<decltype(o_pLoadMapRpaks)>();
+	HookAttach(&(PVOID&)o_pLoadMapRpaks, (PVOID)h_LoadMapRpaks);
+
+	// kinda bad, doing things in rtech in an engine callback but it seems fine for now
+	CModule rtechModule(GetModuleHandleA("rtech_game.dll"));
+	o_pGetPakPatchNumber = rtechModule.Offset(0x9A00).RCast<decltype(o_pGetPakPatchNumber)>();
 }
diff --git a/primedev/core/filesystem/rpakfilesystem.h b/primedev/core/filesystem/rpakfilesystem.h
index bcd57a73..87a41e7b 100644
--- a/primedev/core/filesystem/rpakfilesystem.h
+++ b/primedev/core/filesystem/rpakfilesystem.h
@@ -1,39 +1,81 @@
 #pragma once
 
-enum class ePakLoadSource
-{
-	UNTRACKED = -1, // not a pak we loaded, we shouldn't touch this one
+#include <regex>
 
-	CONSTANT, // should be loaded at all times
-	MAP // loaded from a map, should be unloaded when the map is unloaded
+enum PakHandle : int
+{
+	INVALID = -1,
 };
 
-struct LoadedPak
+struct ModPak_t
 {
-	ePakLoadSource m_nLoadSource;
-	int m_nPakHandle;
-	size_t m_nPakNameHash;
+	std::string m_modName;
+
+	std::string m_path;
+	size_t m_pathHash = 0;
+
+	// If the map being loaded matches this regex, this pak will be loaded.
+	std::regex m_mapRegex;
+	// If a pak with a hash matching this is loaded, this pak will be loaded.
+	size_t m_dependentPakHash = 0;
+	// If this is set, this pak will be loaded whenever any other pak is loaded.
+	bool m_preload = false;
+
+	// If this is set, the Pak will be unloaded on next map load
+	bool m_markedForDelete = false;
+	// The current rpak handle associated with this Pak
+	PakHandle m_handle = PakHandle::INVALID;
 };
 
 class PakLoadManager
 {
-private:
-	std::map<int, LoadedPak> m_vLoadedPaks {};
-	std::unordered_map<size_t, int> m_HashToPakHandle {};
-
 public:
-	int LoadPakAsync(const char* pPath, const ePakLoadSource nLoadSource);
-	void UnloadPak(const int nPakHandle);
-	void UnloadMapPaks();
-	void* LoadFile(const char* path); // this is a guess
+	void UnloadAllModPaks();
+	void TrackModPaks(Mod& mod);
+
+	void CleanUpUnloadedPaks();
+	void UnloadMarkedPaks();
+
+	void LoadModPaksForMap(const char* mapName);
+	void UnloadModPaks();
+
+	// Whether the current context is a vanilla call to a function, or a modded one
+	bool IsVanillaCall() const { return m_reentranceCounter == 0; }
+	// Whether paks will be forced to reload on the next map load
+	bool GetForceReloadOnMapLoad() const { return m_forceReloadOnMapLoad; }
+	void SetForceReloadOnMapLoad(bool value) { m_forceReloadOnMapLoad = value; }
+
+	void OnPakLoaded(std::string& originalPath, std::string& resultingPath, PakHandle resultingHandle);
+	void OnPakUnloading(PakHandle handle);
+
+	void FixupPakPath(std::string& path);
+
+	void LoadPreloadPaks();
+	void ReloadPostloadPaks();
+
+	void* OpenFile(const char* path);
+
+private:
+	void LoadDependentPaks(std::string& path, PakHandle handle);
+	void UnloadDependentPaks(PakHandle handle);
 
-	LoadedPak* TrackLoadedPak(ePakLoadSource nLoadSource, int nPakHandle, size_t nPakNameHash);
-	void RemoveLoadedPak(int nPakHandle);
+	// All paks that vanilla has attempted to load. (they may have been aliased away)
+	// Also known as a list of rpaks that the vanilla game would have loaded at this point in time.
+	std::vector<std::pair<std::string, PakHandle>> m_vanillaPaks;
 
-	LoadedPak* GetPakInfo(const int nPakHandle);
+	// All mod Paks that are currently tracked
+	std::vector<ModPak_t> m_modPaks;
+	// Hashes of the currently loaded map mod paks
+	std::vector<size_t> m_mapPaks;
+	// Currently loaded Pak path hashes that depend on a handle to remain loaded (Postload)
+	std::vector<std::pair<PakHandle, size_t>> m_dependentPaks;
 
-	int GetPakHandle(const size_t nPakNameHash);
-	int GetPakHandle(const char* pPath);
+	// Used to force rpaks to be unloaded and reloaded on the next map load.
+	// Vanilla behaviour is to not do this when loading into mp_lobby, or loading into the same map you were last in.
+	bool m_forceReloadOnMapLoad = false;
+	// Used to track if the current hook call is a vanilla call or not.
+	// When loading/unloading a mod Pak, increment this before doing so, and decrement afterwards.
+	int m_reentranceCounter = 0;
 };
 
 extern PakLoadManager* g_pPakLoadManager;
diff --git a/primedev/core/hooks.cpp b/primedev/core/hooks.cpp
index 5026f837..6146c93c 100644
--- a/primedev/core/hooks.cpp
+++ b/primedev/core/hooks.cpp
@@ -12,8 +12,6 @@
 
 namespace fs = std::filesystem;
 
-AUTOHOOK_INIT()
-
 // called from the ON_DLL_LOAD macros
 __dllLoadCallback::__dllLoadCallback(
 	eDllLoadCallbackSide side, const std::string dllName, DllLoadCallbackFuncType callback, std::string uniqueStr, std::string reliesOn)
@@ -85,18 +83,18 @@ void __fileAutohook::DispatchForModule(const char* pModuleName)
 			hook->Dispatch();
 }
 
-ManualHook::ManualHook(const char* funcName, LPVOID func) : pHookFunc(func), ppOrigFunc(nullptr)
+ManualHook::ManualHook(const char* funcName, LPVOID func)
+	: svFuncName(funcName)
+	, pHookFunc(func)
+	, ppOrigFunc(nullptr)
 {
-	const size_t iFuncNameStrlen = strlen(funcName);
-	pFuncName = new char[iFuncNameStrlen];
-	memcpy(pFuncName, funcName, iFuncNameStrlen);
 }
 
-ManualHook::ManualHook(const char* funcName, LPVOID* orig, LPVOID func) : pHookFunc(func), ppOrigFunc(orig)
+ManualHook::ManualHook(const char* funcName, LPVOID* orig, LPVOID func)
+	: svFuncName(funcName)
+	, pHookFunc(func)
+	, ppOrigFunc(orig)
 {
-	const size_t iFuncNameStrlen = strlen(funcName);
-	pFuncName = new char[iFuncNameStrlen];
-	memcpy(pFuncName, funcName, iFuncNameStrlen);
 }
 
 bool ManualHook::Dispatch(LPVOID addr, LPVOID* orig)
@@ -105,19 +103,19 @@ bool ManualHook::Dispatch(LPVOID addr, LPVOID* orig)
 		ppOrigFunc = orig;
 
 	if (!addr)
-		spdlog::error("Address for hook {} is invalid", pFuncName);
+		spdlog::error("Address for hook {} is invalid", svFuncName);
 	else if (MH_CreateHook(addr, pHookFunc, ppOrigFunc) == MH_OK)
 	{
 		if (MH_EnableHook(addr) == MH_OK)
 		{
-			spdlog::info("Enabling hook {}", pFuncName);
+			spdlog::info("Enabling hook {}", svFuncName);
 			return true;
 		}
 		else
-			spdlog::error("MH_EnableHook failed for function {}", pFuncName);
+			spdlog::error("MH_EnableHook failed for function {}", svFuncName);
 	}
 	else
-		spdlog::error("MH_CreateHook failed for function {}", pFuncName);
+		spdlog::error("MH_CreateHook failed for function {}", svFuncName);
 
 	return false;
 }
@@ -223,14 +221,15 @@ void MakeHook(LPVOID pTarget, LPVOID pDetour, void* ppOriginal, const char* pFun
 		spdlog::error("MH_CreateHook failed for function {}", pStrippedFuncName);
 }
 
-AUTOHOOK_ABSOLUTEADDR(_GetCommandLineA, (LPVOID)GetCommandLineA, LPSTR, WINAPI, ())
+static LPSTR(WINAPI* o_pGetCommandLineA)() = nullptr;
+static LPSTR WINAPI h_GetCommandLineA()
 {
 	static char* cmdlineModified;
 	static char* cmdlineOrg;
 
 	if (cmdlineOrg == nullptr || cmdlineModified == nullptr)
 	{
-		cmdlineOrg = _GetCommandLineA();
+		cmdlineOrg = o_pGetCommandLineA();
 		bool isDedi = strstr(cmdlineOrg, "-dedicated"); // well, this one has to be a real argument
 		bool ignoreStartupArgs = strstr(cmdlineOrg, "-nostartupargs");
 
@@ -328,8 +327,6 @@ void CallLoadLibraryACallbacks(LPCSTR lpLibFileName, HMODULE moduleAddress)
 
 void CallLoadLibraryWCallbacks(LPCWSTR lpLibFileName, HMODULE moduleAddress)
 {
-	CModule cModule(moduleAddress);
-
 	while (true)
 	{
 		bool bDoneCalling = true;
@@ -396,6 +393,7 @@ void HookSys_Init()
 	{
 		spdlog::error("MH_Initialize (minhook initialization) failed");
 	}
-	// todo: remove remaining instances of autohook in this file
-	AUTOHOOK_DISPATCH()
+
+	o_pGetCommandLineA = GetCommandLineA;
+	HookAttach(&(PVOID&)o_pGetCommandLineA, (PVOID)h_GetCommandLineA);
 }
diff --git a/primedev/core/hooks.h b/primedev/core/hooks.h
index facf51bf..26d9483c 100644
--- a/primedev/core/hooks.h
+++ b/primedev/core/hooks.h
@@ -140,7 +140,9 @@ public:
 	__autohook() = delete;
 
 	__autohook(__fileAutohook* autohook, const char* funcName, LPVOID absoluteAddress, LPVOID* orig, LPVOID func)
-		: pHookFunc(func), ppOrigFunc(orig), iAbsoluteAddress(absoluteAddress)
+		: pHookFunc(func)
+		, ppOrigFunc(orig)
+		, iAbsoluteAddress(absoluteAddress)
 	{
 		iAddressResolutionMode = ABSOLUTE_ADDR;
 
@@ -152,7 +154,8 @@ public:
 	}
 
 	__autohook(__fileAutohook* autohook, const char* funcName, const char* addrString, LPVOID* orig, LPVOID func)
-		: pHookFunc(func), ppOrigFunc(orig)
+		: pHookFunc(func)
+		, ppOrigFunc(orig)
 	{
 		iAddressResolutionMode = OFFSET_STRING;
 
@@ -168,7 +171,8 @@ public:
 	}
 
 	__autohook(__fileAutohook* autohook, const char* funcName, const char* moduleName, const char* procName, LPVOID* orig, LPVOID func)
-		: pHookFunc(func), ppOrigFunc(orig)
+		: pHookFunc(func)
+		, ppOrigFunc(orig)
 	{
 		iAddressResolutionMode = PROCADDRESS;
 
@@ -278,7 +282,7 @@ public:
 class ManualHook
 {
 public:
-	char* pFuncName;
+	std::string svFuncName;
 
 	LPVOID pHookFunc;
 	LPVOID* ppOrigFunc;
@@ -327,10 +331,7 @@ public:
 		pAutohook->vars.push_back(this);
 	}
 
-	void Dispatch()
-	{
-		*m_pTarget = (void*)ParseDLLOffsetString(m_pAddrString);
-	}
+	void Dispatch() { *m_pTarget = (void*)ParseDLLOffsetString(m_pAddrString); }
 };
 
 // VAR_AT(engine.dll+0x404, ConVar*, Cvar_host_timescale)
diff --git a/primedev/core/math/bitbuf.h b/primedev/core/math/bitbuf.h
index a06dab17..33056e63 100644
--- a/primedev/core/math/bitbuf.h
+++ b/primedev/core/math/bitbuf.h
@@ -90,25 +90,13 @@ enum EBitCoordType
 class BitBufferBase
 {
 protected:
-	INLINE void SetName(const char* name)
-	{
-		m_BufferName = name;
-	}
+	INLINE void SetName(const char* name) { m_BufferName = name; }
 
 public:
-	INLINE bool IsOverflowed()
-	{
-		return m_Overflow;
-	}
-	INLINE void SetOverflowed()
-	{
-		m_Overflow = true;
-	}
+	INLINE bool IsOverflowed() { return m_Overflow; }
+	INLINE void SetOverflowed() { m_Overflow = true; }
 
-	INLINE const char* GetName()
-	{
-		return m_BufferName;
-	}
+	INLINE const char* GetName() { return m_BufferName; }
 
 private:
 	const char* m_BufferName = "";
@@ -437,28 +425,13 @@ public:
 		return fReturn;
 	}
 
-	INLINE i32 ReadChar()
-	{
-		return ReadSBitLong(sizeof(char) << 3);
-	}
-	INLINE u32 ReadByte()
-	{
-		return ReadUBitLong(sizeof(unsigned char) << 3);
-	}
+	INLINE i32 ReadChar() { return ReadSBitLong(sizeof(char) << 3); }
+	INLINE u32 ReadByte() { return ReadUBitLong(sizeof(unsigned char) << 3); }
 
-	INLINE i32 ReadShort()
-	{
-		return ReadSBitLong(sizeof(short) << 3);
-	}
-	INLINE u32 ReadWord()
-	{
-		return ReadUBitLong(sizeof(unsigned short) << 3);
-	}
+	INLINE i32 ReadShort() { return ReadSBitLong(sizeof(short) << 3); }
+	INLINE u32 ReadWord() { return ReadUBitLong(sizeof(unsigned short) << 3); }
 
-	INLINE i32 ReadLong()
-	{
-		return (i32)(ReadUBitLong(sizeof(i32) << 3));
-	}
+	INLINE i32 ReadLong() { return (i32)(ReadUBitLong(sizeof(i32) << 3)); }
 	INLINE float ReadFloat()
 	{
 		u32 temp = ReadUBitLong(sizeof(float) << 3);
@@ -687,24 +660,12 @@ public:
 		return std::min(nCurOfs + nAdjust, m_DataBits);
 	}
 
-	INLINE bool SeekRelative(size_t offset)
-	{
-		return Seek(GetNumBitsRead() + offset);
-	}
+	INLINE bool SeekRelative(size_t offset) { return Seek(GetNumBitsRead() + offset); }
 
-	INLINE size_t TotalBytesAvailable()
-	{
-		return m_DataBytes;
-	}
+	INLINE size_t TotalBytesAvailable() { return m_DataBytes; }
 
-	INLINE size_t GetNumBitsLeft()
-	{
-		return m_DataBits - GetNumBitsRead();
-	}
-	INLINE size_t GetNumBytesLeft()
-	{
-		return GetNumBitsLeft() >> 3;
-	}
+	INLINE size_t GetNumBitsLeft() { return m_DataBits - GetNumBitsRead(); }
+	INLINE size_t GetNumBytesLeft() { return GetNumBitsLeft() >> 3; }
 
 private:
 	size_t m_DataBits; // 0x0010
@@ -743,10 +704,7 @@ public:
 		m_DataEnd = reinterpret_cast<u32*>(reinterpret_cast<u8*>(m_Data) + m_DataBytes);
 	}
 
-	INLINE int GetNumBitsLeft()
-	{
-		return m_OutBitsLeft + (32 * (m_DataEnd - m_DataOut - 1));
-	}
+	INLINE int GetNumBitsLeft() { return m_OutBitsLeft + (32 * (m_DataEnd - m_DataOut - 1)); }
 
 	INLINE void Reset()
 	{
@@ -775,10 +733,7 @@ public:
 		return reinterpret_cast<u8*>(m_Data);
 	}
 
-	INLINE u8* GetData()
-	{
-		return GetBasePointer();
-	}
+	INLINE u8* GetData() { return GetBasePointer(); }
 
 	INLINE void Finish()
 	{
@@ -851,10 +806,7 @@ public:
 		}
 	}
 
-	INLINE void WriteSBitLong(i32 data, i32 numBits)
-	{
-		WriteUBitLong((u32)data, numBits, false);
-	}
+	INLINE void WriteSBitLong(i32 data, i32 numBits) { WriteUBitLong((u32)data, numBits, false); }
 
 	INLINE void WriteUBitVar(u32 n)
 	{
@@ -911,40 +863,19 @@ public:
 		return !IsOverflowed();
 	}
 
-	INLINE bool WriteBytes(const uptr data, i32 numBytes)
-	{
-		return WriteBits(data, numBytes << 3);
-	}
+	INLINE bool WriteBytes(const uptr data, i32 numBytes) { return WriteBits(data, numBytes << 3); }
 
-	INLINE i32 GetNumBitsWritten()
-	{
-		return (32 - m_OutBitsLeft) + (32 * (m_DataOut - m_Data));
-	}
+	INLINE i32 GetNumBitsWritten() { return (32 - m_OutBitsLeft) + (32 * (m_DataOut - m_Data)); }
 
-	INLINE i32 GetNumBytesWritten()
-	{
-		return (GetNumBitsWritten() + 7) >> 3;
-	}
+	INLINE i32 GetNumBytesWritten() { return (GetNumBitsWritten() + 7) >> 3; }
 
-	INLINE void WriteChar(i32 val)
-	{
-		WriteSBitLong(val, sizeof(char) << 3);
-	}
+	INLINE void WriteChar(i32 val) { WriteSBitLong(val, sizeof(char) << 3); }
 
-	INLINE void WriteByte(i32 val)
-	{
-		WriteUBitLong(val, sizeof(unsigned char) << 3, false);
-	}
+	INLINE void WriteByte(i32 val) { WriteUBitLong(val, sizeof(unsigned char) << 3, false); }
 
-	INLINE void WriteShort(i32 val)
-	{
-		WriteSBitLong(val, sizeof(short) << 3);
-	}
+	INLINE void WriteShort(i32 val) { WriteSBitLong(val, sizeof(short) << 3); }
 
-	INLINE void WriteWord(i32 val)
-	{
-		WriteUBitLong(val, sizeof(unsigned short) << 3);
-	}
+	INLINE void WriteWord(i32 val) { WriteUBitLong(val, sizeof(unsigned short) << 3); }
 
 	INLINE bool WriteString(const char* str)
 	{
diff --git a/primedev/core/math/color.h b/primedev/core/math/color.h
index 013c4e4c..a46bc089 100644
--- a/primedev/core/math/color.h
+++ b/primedev/core/math/color.h
@@ -7,22 +7,10 @@ struct color24
 
 typedef struct color32_s
 {
-	bool operator!=(const struct color32_s& other) const
-	{
-		return r != other.r || g != other.g || b != other.b || a != other.a;
-	}
-	inline unsigned* asInt(void)
-	{
-		return reinterpret_cast<unsigned*>(this);
-	}
-	inline const unsigned* asInt(void) const
-	{
-		return reinterpret_cast<const unsigned*>(this);
-	}
-	inline void Copy(const color32_s& rhs)
-	{
-		*asInt() = *rhs.asInt();
-	}
+	bool operator!=(const struct color32_s& other) const { return r != other.r || g != other.g || b != other.b || a != other.a; }
+	inline unsigned* asInt(void) { return reinterpret_cast<unsigned*>(this); }
+	inline const unsigned* asInt(void) const { return reinterpret_cast<const unsigned*>(this); }
+	inline void Copy(const color32_s& rhs) { *asInt() = *rhs.asInt(); }
 
 	uint8_t r, g, b, a;
 } color32;
@@ -79,55 +67,22 @@ public:
 		_b = _color[2];
 		_a = _color[3];
 	}
-	int GetValue(int index) const
-	{
-		return _color[index];
-	}
-	void SetRawColor(int color32)
-	{
-		*((int*)this) = color32;
-	}
-	int GetRawColor(void) const
-	{
-		return *((int*)this);
-	}
+	int GetValue(int index) const { return _color[index]; }
+	void SetRawColor(int color32) { *((int*)this) = color32; }
+	int GetRawColor(void) const { return *((int*)this); }
 
-	inline int r() const
-	{
-		return _color[0];
-	}
-	inline int g() const
-	{
-		return _color[1];
-	}
-	inline int b() const
-	{
-		return _color[2];
-	}
-	inline int a() const
-	{
-		return _color[3];
-	}
+	inline int r() const { return _color[0]; }
+	inline int g() const { return _color[1]; }
+	inline int b() const { return _color[2]; }
+	inline int a() const { return _color[3]; }
 
-	unsigned char& operator[](int index)
-	{
-		return _color[index];
-	}
+	unsigned char& operator[](int index) { return _color[index]; }
 
-	const unsigned char& operator[](int index) const
-	{
-		return _color[index];
-	}
+	const unsigned char& operator[](int index) const { return _color[index]; }
 
-	bool operator==(const Color& rhs) const
-	{
-		return (*((int*)this) == *((int*)&rhs));
-	}
+	bool operator==(const Color& rhs) const { return (*((int*)this) == *((int*)&rhs)); }
 
-	bool operator!=(const Color& rhs) const
-	{
-		return !(operator==(rhs));
-	}
+	bool operator!=(const Color& rhs) const { return !(operator==(rhs)); }
 
 	Color& operator=(const Color& rhs)
 	{
@@ -164,10 +119,7 @@ public:
 		return out;
 	}
 
-	SourceColor ToSourceColor()
-	{
-		return SourceColor(_color[0], _color[1], _color[2], _color[3]);
-	}
+	SourceColor ToSourceColor() { return SourceColor(_color[0], _color[1], _color[2], _color[3]); }
 
 private:
 	unsigned char _color[4];
diff --git a/primedev/core/math/vector.h b/primedev/core/math/vector.h
index e62f2c93..ea1de65e 100644
--- a/primedev/core/math/vector.h
+++ b/primedev/core/math/vector.h
@@ -13,15 +13,27 @@ class Vector3
 public:
 	float x, y, z;
 
-	Vector3(float _x, float _y, float _z) : x(_x), y(_y), z(_z) {}
-	Vector3(float _f) : x(_f), y(_f), z(_f) {}
-	Vector3() : x(0.0f), y(0.0f), z(0.0f) {}
-
-	inline bool IsValid()
+	Vector3(float _x, float _y, float _z)
+		: x(_x)
+		, y(_y)
+		, z(_z)
+	{
+	}
+	Vector3(float _f)
+		: x(_f)
+		, y(_f)
+		, z(_f)
+	{
+	}
+	Vector3()
+		: x(0.0f)
+		, y(0.0f)
+		, z(0.0f)
 	{
-		return IsFinite(x) && IsFinite(y) && IsFinite(z);
 	}
 
+	inline bool IsValid() { return IsFinite(x) && IsFinite(y) && IsFinite(z); }
+
 	inline void Init(float fX = 0.0f, float fY = 0.0f, float fZ = 0.0f)
 	{
 		x = fX;
@@ -29,10 +41,7 @@ public:
 		z = fZ;
 	}
 
-	inline float Length()
-	{
-		return FastSqrt(x * x + y * y + z * z);
-	}
+	inline float Length() { return FastSqrt(x * x + y * y + z * z); }
 
 	inline float DistTo(const Vector3& vOther)
 	{
@@ -44,10 +53,7 @@ public:
 		return vDelta.Length();
 	}
 
-	float Dot(const Vector3& vOther) const
-	{
-		return x * vOther.x + y * vOther.y + z * vOther.z;
-	}
+	float Dot(const Vector3& vOther) const { return x * vOther.x + y * vOther.y + z * vOther.z; }
 
 	// Cross product between two vectors.
 	Vector3 Cross(const Vector3& vOther) const;
@@ -311,17 +317,29 @@ public:
 	float y;
 	float z;
 
-	QAngle(float _x, float _y, float _z) : x(_x), y(_y), z(_z) {}
-	QAngle(float _f) : x(_f), y(_f), z(_f) {}
-	QAngle() : x(0.0f), y(0.0f), z(0.0f) {}
+	QAngle(float _x, float _y, float _z)
+		: x(_x)
+		, y(_y)
+		, z(_z)
+	{
+	}
+	QAngle(float _f)
+		: x(_f)
+		, y(_f)
+		, z(_f)
+	{
+	}
+	QAngle()
+		: x(0.0f)
+		, y(0.0f)
+		, z(0.0f)
+	{
+	}
 
 	Vector3 GetNormal() const;
 
 	// todo: more operators maybe
-	bool operator==(const QAngle& other)
-	{
-		return x == other.x && y == other.y && z == other.z;
-	}
+	bool operator==(const QAngle& other) { return x == other.x && y == other.y && z == other.z; }
 };
 
 inline Vector3 QAngle::GetNormal() const
diff --git a/primedev/core/memalloc.h b/primedev/core/memalloc.h
index 73e078f5..a55ce361 100644
--- a/primedev/core/memalloc.h
+++ b/primedev/core/memalloc.h
@@ -40,10 +40,7 @@ public:
 		}
 		return _realloc_base(originalPtr, newSize);
 	}
-	static void Free(void* ptr)
-	{
-		_free_base(ptr);
-	}
+	static void Free(void* ptr) { _free_base(ptr); }
 };
 
 typedef rapidjson::GenericDocument<rapidjson::UTF8<>, rapidjson::MemoryPoolAllocator<SourceAllocator>, SourceAllocator> rapidjson_document;
diff --git a/primedev/core/sourceinterface.cpp b/primedev/core/sourceinterface.cpp
index 5a72beb0..7ce33925 100644
--- a/primedev/core/sourceinterface.cpp
+++ b/primedev/core/sourceinterface.cpp
@@ -1,16 +1,11 @@
-#include "sourceinterface.h"
 #include "logging/sourceconsole.h"
 
-AUTOHOOK_INIT()
-
 // really wanted to do a modular callback system here but honestly couldn't be bothered so hardcoding stuff for now: todo later
 
-// clang-format off
-AUTOHOOK_PROCADDRESS(ClientCreateInterface, client.dll, CreateInterface, 
-void*, __fastcall, (const char* pName, const int* pReturnCode))
-// clang-format on
+static void*(__fastcall* o_pClientCreateInterface)(const char* pName, const int* pReturnCode) = nullptr;
+static void* __fastcall h_ClientCreateInterface(const char* pName, const int* pReturnCode)
 {
-	void* ret = ClientCreateInterface(pName, pReturnCode);
+	void* ret = o_pClientCreateInterface(pName, pReturnCode);
 	spdlog::info("CreateInterface CLIENT {}", pName);
 
 	if (!strcmp(pName, "GameClientExports001"))
@@ -19,30 +14,38 @@ void*, __fastcall, (const char* pName, const int* pReturnCode))
 	return ret;
 }
 
-// clang-format off
-AUTOHOOK_PROCADDRESS(ServerCreateInterface, server.dll, CreateInterface, 
-void*, __fastcall, (const char* pName, const int* pReturnCode))
-// clang-format on
+static void*(__fastcall* o_pServerCreateInterface)(const char* pName, const int* pReturnCode) = nullptr;
+static void* __fastcall h_ServerCreateInterface(const char* pName, const int* pReturnCode)
 {
-	void* ret = ServerCreateInterface(pName, pReturnCode);
+	void* ret = o_pServerCreateInterface(pName, pReturnCode);
 	spdlog::info("CreateInterface SERVER {}", pName);
 
 	return ret;
 }
 
-// clang-format off
-AUTOHOOK_PROCADDRESS(EngineCreateInterface, engine.dll, CreateInterface, 
-void*, __fastcall, (const char* pName, const int* pReturnCode))
-// clang-format on
+static void*(__fastcall* o_pEngineCreateInterface)(const char* pName, const int* pReturnCode) = nullptr;
+static void* __fastcall h_EngineCreateInterface(const char* pName, const int* pReturnCode)
 {
-	void* ret = EngineCreateInterface(pName, pReturnCode);
+	void* ret = o_pEngineCreateInterface(pName, pReturnCode);
 	spdlog::info("CreateInterface ENGINE {}", pName);
 
 	return ret;
 }
 
-// clang-format off
-ON_DLL_LOAD("client.dll", ClientInterface, (CModule module)) {AUTOHOOK_DISPATCH_MODULE(client.dll)}
-ON_DLL_LOAD("server.dll", ServerInterface, (CModule module)) {AUTOHOOK_DISPATCH_MODULE(server.dll)}
-ON_DLL_LOAD("engine.dll", EngineInterface, (CModule module)) {AUTOHOOK_DISPATCH_MODULE(engine.dll)}
-// clang-format on
+ON_DLL_LOAD("client.dll", ClientInterface, (CModule module))
+{
+	o_pClientCreateInterface = module.GetExportedFunction("CreateInterface").RCast<decltype(o_pClientCreateInterface)>();
+	HookAttach(&(PVOID&)o_pClientCreateInterface, (PVOID)h_ClientCreateInterface);
+}
+
+ON_DLL_LOAD("server.dll", ServerInterface, (CModule module))
+{
+	o_pServerCreateInterface = module.GetExportedFunction("CreateInterface").RCast<decltype(o_pServerCreateInterface)>();
+	HookAttach(&(PVOID&)o_pServerCreateInterface, (PVOID)h_ServerCreateInterface);
+}
+
+ON_DLL_LOAD("engine.dll", EngineInterface, (CModule module))
+{
+	o_pEngineCreateInterface = module.GetExportedFunction("CreateInterface").RCast<decltype(o_pEngineCreateInterface)>();
+	HookAttach(&(PVOID&)o_pEngineCreateInterface, (PVOID)h_EngineCreateInterface);
+}
diff --git a/primedev/core/sourceinterface.h b/primedev/core/sourceinterface.h
deleted file mode 100644
index bbbbd3bc..00000000
--- a/primedev/core/sourceinterface.h
+++ /dev/null
@@ -1,38 +0,0 @@
-#pragma once
-#include <string>
-
-// interface return status
-enum class InterfaceStatus : int
-{
-	IFACE_OK = 0,
-	IFACE_FAILED,
-};
-
-// literally just copied from ttf2sdk definition
-typedef void* (*CreateInterfaceFn)(const char* pName, int* pReturnCode);
-
-template <typename T> class SourceInterface
-{
-private:
-	T* m_interface;
-
-public:
-	SourceInterface(const std::string& moduleName, const std::string& interfaceName)
-	{
-		HMODULE handle = GetModuleHandleA(moduleName.c_str());
-		CreateInterfaceFn createInterface = (CreateInterfaceFn)GetProcAddress(handle, "CreateInterface");
-		m_interface = (T*)createInterface(interfaceName.c_str(), NULL);
-		if (m_interface == nullptr)
-			spdlog::error("Failed to call CreateInterface for %s in %s", interfaceName, moduleName);
-	}
-
-	T* operator->() const
-	{
-		return m_interface;
-	}
-
-	operator T*() const
-	{
-		return m_interface;
-	}
-};
diff --git a/primedev/core/tier0.cpp b/primedev/core/tier0.cpp
index dd5ac245..639b3bf8 100644
--- a/primedev/core/tier0.cpp
+++ b/primedev/core/tier0.cpp
@@ -18,11 +18,40 @@ void TryCreateGlobalMemAlloc()
 	g_pMemAllocSingleton = CreateGlobalMemAlloc(); // if it already exists, this returns the preexisting IMemAlloc instance
 }
 
+HRESULT WINAPI _SetThreadDescription(HANDLE hThread, PCWSTR lpThreadDescription)
+{
+	// need to grab it dynamically as this function was only introduced at some point in Windows 10
+	static decltype(&SetThreadDescription) _SetThreadDescription =
+		CModule("KernelBase.dll").GetExportedFunction("SetThreadDescription").RCast<decltype(&SetThreadDescription)>();
+
+	if (_SetThreadDescription)
+		return _SetThreadDescription(hThread, lpThreadDescription);
+
+	return ERROR_OLD_WIN_VERSION;
+}
+
+static void(__fastcall* o_pThreadSetDebugName)(HANDLE threadHandle, const char* name) = nullptr;
+static void __fastcall h_ThreadSetDebugName(HANDLE threadHandle, const char* name)
+{
+	if (threadHandle == 0)
+		threadHandle = GetCurrentThread();
+
+	// TODO: This "method" of "charset conversion" from string to wstring is abhorrent. Change it to a proper one
+	// as soon as Northstar has some helper function to do proper charset conversions.
+	auto tmp = std::string(name);
+	_SetThreadDescription(threadHandle, std::wstring(tmp.begin(), tmp.end()).c_str());
+
+	o_pThreadSetDebugName(threadHandle, name);
+}
+
 ON_DLL_LOAD("tier0.dll", Tier0GameFuncs, (CModule module))
 {
 	// shouldn't be necessary, but do this just in case
 	TryCreateGlobalMemAlloc();
 
+	o_pThreadSetDebugName = module.GetExportedFunction("ThreadSetDebugName").RCast<decltype(o_pThreadSetDebugName)>();
+	HookAttach(&(PVOID&)o_pThreadSetDebugName, (PVOID)h_ThreadSetDebugName);
+
 	// setup tier0 funcs
 	CommandLine = module.GetExportedFunction("CommandLine").RCast<CommandLineType>();
 	Plat_FloatTime = module.GetExportedFunction("Plat_FloatTime").RCast<Plat_FloatTimeType>();
diff --git a/primedev/core/tier1.h b/primedev/core/tier1.h
index d162e7c8..36f577cc 100644
--- a/primedev/core/tier1.h
+++ b/primedev/core/tier1.h
@@ -7,6 +7,12 @@
 
 #define CREATEINTERFACE_PROCNAME "CreateInterface"
 
+enum class InterfaceStatus : int
+{
+	IFACE_OK = 0,
+	IFACE_FAILED,
+};
+
 typedef void* (*CreateInterfaceFn)(const char* pName, int* pReturnCode);
 
 CMemory Sys_GetFactoryPtr(const std::string& svModuleName, const std::string& svFact);
diff --git a/primedev/core/vanilla.h b/primedev/core/vanilla.h
index b0797803..356495c8 100644
--- a/primedev/core/vanilla.h
+++ b/primedev/core/vanilla.h
@@ -17,10 +17,7 @@ public:
 		m_bIsVanillaCompatible = isVanilla;
 	}
 
-	bool GetVanillaCompatibility()
-	{
-		return m_bIsVanillaCompatible;
-	}
+	bool GetVanillaCompatibility() { return m_bIsVanillaCompatible; }
 
 private:
 	bool m_bIsVanillaCompatible = false;