Let us start here, from square one. No, from Zero!

games/game.h

@@ -0,0 +1,24 @@
+#pragma once
+
+#include <string>
+
+namespace games {
+
+    class Game {
+    private:
+        std::string name;
+
+    public:
+
+        Game(std::string name);
+        virtual ~Game() = default;
+
+        // where the main magic will happen
+        virtual void attach();
+
+        // optional
+        virtual void pre_attach();
+        virtual void post_attach();
+        virtual void detach();
+    };
+}