diff --git a/src/client/game/game.cpp b/src/client/game/game.cpp
index 0fb8f24a..bcd52d81 100644
--- a/src/client/game/game.cpp
+++ b/src/client/game/game.cpp
@@ -37,6 +37,18 @@ namespace game
 		return server;
 	}
 
+	bool is_client()
+	{
+		static const auto server = get_host_library().get_optional_header()->CheckSum == 0x888C368;
+		return server;
+	}
+
+	bool is_legacy_client()
+	{
+		static const auto server = get_host_library().get_optional_header()->CheckSum == 0x8880704;
+		return server;
+	}
+
 	std::filesystem::path get_appdata_path()
 	{
 		static const auto appdata_path = []
diff --git a/src/client/game/game.hpp b/src/client/game/game.hpp
index 2a825538..6c48470f 100644
--- a/src/client/game/game.hpp
+++ b/src/client/game/game.hpp
@@ -7,6 +7,8 @@ namespace game
 {
 	size_t get_base();
 	bool is_server();
+	bool is_client();
+	bool is_legacy_client();
 
 	inline size_t relocate(const size_t val)
 	{
diff --git a/src/client/main.cpp b/src/client/main.cpp
index 23b3f708..cd04cf9f 100644
--- a/src/client/main.cpp
+++ b/src/client/main.cpp
@@ -314,6 +314,16 @@ namespace
 					throw std::runtime_error("Bad binary loaded into memory");
 				}
 
+				if (!is_server && !game::is_legacy_client())
+				{
+					if(game::is_client())
+					{
+						throw std::runtime_error("You are running the latest Steam update. We're working on supporting it. For the time being, however, you have to revert to the old binary.");
+					}
+
+					throw std::runtime_error("Bad binary loaded into memory");
+				}
+
 				patch_imports();
 
 				if (!component_loader::post_load())