Use t6-gsc-utils as a base.

src/game/game.cpp

@@ -0,0 +1,32 @@
+#include <stdinc.hpp>
+#include "game.hpp"
+
+#include <utils/hook.hpp>
+
+namespace game
+{
+	gamemode current = reinterpret_cast<const char*>(0x88A5DC) != "CoDWaW.exe"s
+		? gamemode::multiplayer
+		: gamemode::singleplayer;
+
+	namespace environment
+	{
+		bool t4mp()
+		{
+			return current == gamemode::multiplayer;
+		}
+
+		bool t4sp()
+		{
+			return current == gamemode::singleplayer;
+		}
+	}
+
+	namespace plutonium
+	{
+		bool is_up_to_date()
+		{
+			return true;
+		}
+	}
+}