diff --git a/src/client/component/fastfiles.cpp b/src/client/component/fastfiles.cpp
index f6f34b19..0421f083 100644
--- a/src/client/component/fastfiles.cpp
+++ b/src/client/component/fastfiles.cpp
@@ -73,6 +73,56 @@ namespace fastfiles
 				localized_strings::override(str, str);
 			}
 		}
+
+		utils::hook::detour db_read_stream_file_hook;
+		void db_read_stream_file_stub(int a1, int a2)
+		{
+			// always use lz4 compressor type when reading stream files
+			*game::g_compressor = 4;
+			return db_read_stream_file_hook.invoke<void>(a1, a2);
+		}
+
+		bool exists(const std::string& zone)
+		{
+			const auto is_localized = game::DB_IsLocalized(zone.data());
+			const auto db_fs = game::DB_FSInitialize();
+
+			auto handle = db_fs->vftbl->OpenFile(db_fs, 
+				(is_localized ? game::SF_ZONE_LOC : game::SF_ZONE), utils::string::va("%s.ff", zone.data()));
+			const auto _0 = gsl::finally([&]
+			{
+				if (handle != nullptr)
+				{
+					db_fs->vftbl->Close(db_fs, handle);
+				}
+
+			});
+
+			return handle != nullptr;
+		}
+
+		void skip_extra_zones_stub(utils::hook::assembler& a)
+		{
+			const auto skip = a.newLabel();
+			const auto original = a.newLabel();
+
+			a.pushad64();
+			a.test(r15d, game::DB_ZONE_CUSTOM); // allocFlags
+			a.jnz(skip);
+
+			a.bind(original);
+			a.popad64();
+			a.mov(r8d, 9);
+			a.mov(rdx, 0x140933528);
+			a.jmp(0x140415E09);
+
+			a.bind(skip);
+			a.popad64();
+			a.mov(r14d, game::DB_ZONE_CUSTOM);
+			a.not_(r14d);
+			a.and_(r15d, r14d);
+			a.jmp(0x140415E29);
+		}
 	}
 
 	void enum_assets(const game::XAssetType type, const std::function<void(game::XAssetHeader)>& callback, const bool includeOverride)
@@ -103,6 +153,16 @@ namespace fastfiles
 
 			add_missing_localized_strings();
 
+			// Allow loading of mixed compressor types
+			utils::hook::nop(0x1403E66A7, 2);
+
+			// Fix compressor type on streamed file load
+			db_read_stream_file_hook.create(0x14041D710, db_read_stream_file_stub);
+
+			// Don't load extra zones with loadzone
+			utils::hook::nop(0x140415DFC, 13);
+			utils::hook::jump(0x140415DFC, utils::hook::assemble(skip_extra_zones_stub), true);
+
 			command::add("loadzone", [](const command::params& params)
 			{
 				if (params.size() < 2)
@@ -111,9 +171,17 @@ namespace fastfiles
 					return;
 				}
 
+				const auto name = params.get(1);
+
+				if (!fastfiles::exists(name))
+				{
+					console::warn("loadzone: zone \"%s\" could not be found!\n", name);
+					return;
+				}
+
 				game::XZoneInfo info{};
-				info.name = params.get(1);
-				info.allocFlags = 1;
+				info.name = name;
+				info.allocFlags = game::DB_ZONE_GAME | game::DB_ZONE_CUSTOM;
 				info.freeFlags = 0;
 				game::DB_LoadXAssets(&info, 1u, game::DBSyncMode::DB_LOAD_SYNC);
 			});
diff --git a/src/client/component/mapents.cpp b/src/client/component/mapents.cpp
index c597e6e2..3954d4e8 100644
--- a/src/client/component/mapents.cpp
+++ b/src/client/component/mapents.cpp
@@ -276,6 +276,12 @@ namespace mapents
 			scripting::token_map[name] = id;
 		}
 
+		void add_field(const std::string& name, game::scriptType_e type, unsigned int id)
+		{
+			custom_fields[id] = type;
+			scripting::token_map[name] = id;
+		}
+
 		utils::hook::detour scr_find_field_hook;
 		unsigned int scr_find_field_stub(unsigned int name, game::scriptType_e* type)
 		{
@@ -382,7 +388,7 @@ namespace mapents
 			utils::hook::call(0x14058BD6B, should_load_addon_mapents);
 			utils::hook::call(0x1406B3384, cm_trigger_model_bounds_stub);
 
-			add_field("script_specialops", game::SCRIPT_INTEGER);
+			add_field("script_specialops", game::SCRIPT_INTEGER, 0x20000);
 		}
 	};
 }
diff --git a/src/client/game/structs.hpp b/src/client/game/structs.hpp
index 7fb35b20..731b3455 100644
--- a/src/client/game/structs.hpp
+++ b/src/client/game/structs.hpp
@@ -995,6 +995,20 @@ namespace game
 		DB_LOAD_SYNC_SKIP_ALWAYS_LOADED = 0x5,
 	};
 
+	enum DBAllocFlags : std::int32_t
+	{
+		DB_ZONE_NONE = 0x0,
+		DB_ZONE_COMMON = 0x1,
+		DB_ZONE_UI = 0x2,
+		DB_ZONE_GAME = 0x4,
+		DB_ZONE_LOAD = 0x8,
+		DB_ZONE_DEV = 0x10,
+		DB_ZONE_BASEMAP = 0x20,
+		DB_ZONE_TRANSIENT_POOL = 0x40,
+		DB_ZONE_TRANSIENT_MASK = 0x40,
+		DB_ZONE_CUSTOM = 0x1000 // added for custom zone loading
+	};
+
 	struct XZoneInfo
 	{
 		const char* name;
diff --git a/src/client/game/symbols.hpp b/src/client/game/symbols.hpp
index d6c51ebf..b7dff7f6 100644
--- a/src/client/game/symbols.hpp
+++ b/src/client/game/symbols.hpp
@@ -44,7 +44,8 @@ namespace game
 	WEAK symbol<int(const RawFile* rawfile)> DB_GetRawFileLen{0x140413D80};
 	WEAK symbol<int(const RawFile* rawfile, char* buf, int size)> DB_GetRawBuffer{0x140413C40};
 	WEAK symbol<XAssetEntry*(XAssetType type, XAssetHeader* header)> DB_LinkXAssetEntry1{0x140414900};
-
+	WEAK symbol<bool(const char* zoneName)> DB_IsLocalized{0x1404141E0};
+	
 	WEAK symbol<dvar_t*(const char* name)> Dvar_FindVar{0x140618F90};
 	WEAK symbol<dvar_t*(int hash)> Dvar_FindMalleableVar{0x140618F00};
 	WEAK symbol<void(char* buffer, int index)> Dvar_GetCombinedString{0x1405A75D0};
@@ -192,6 +193,7 @@ namespace game
 
 	WEAK symbol<const char*> g_assetNames{0x140BEF280};
 
+	WEAK symbol<int> g_compressor{0x142065E80};
 	WEAK symbol<int> g_poolSize{0x140BF2E40};
 
 	WEAK symbol<gentity_s> g_entities{0x1452DDDA0};