Three new gamemodes in Modern Warfare 2 already seem to be in the game, but will be unlocked once buying the DLC... This video shows that with a few simple hacks you can already unlock those game modes...
Game modes include a CTF with 1 flag, VIP (same as in Counter Strike) and Global Thermonuclear War, where a team needs to capture something and killing everybody when they actually do. Gues IW pushed the finger in a little deeper at PC gamers...