I think COD4 had a lot to say about Iraq and the war on terror.
The mysterious Muslim city was a thinly veiled Baghdad, and players must surely reflect how difficult it was to survive in that environment.
And what about the surreal level where you rain down fire from a C130? War as a videogame simulates war when it really is fought like a videogame.
The game drew heavily on the current context, and reflected it at some strange angles. An amazing achievement, more so than GTA.