Call of Duty 4 leaves the oft-played battlefields of World War II behind and enters the modern age. The game takes place in current hot spots around the world, rendering the ravaged landscapes with the right amount of grit and a great amount of reality.
You wouldn't expect a game that looks as good as Call of Duty 4 to run well without the best hardware, but the developers made the game accessible on a broad range of computers. Call of Duty 4 still manages to look decent even at its lowest quality settings. However, multiplayer battles -- the likes of which Call of Duty 4 is famous for -- will tax even the best of computers. The key to making Call of Duty 4 run really well is to upgrade evenly across all the major component classes and to select the appropriate settings.