Purchasers of the PC version of Modern Warfare 2 may have to deal with the absence of custom servers, but they have one advantage: The ability to look deep into the game and discover unannounced/aborted/and otherwise secret content.

Game enthusiasts who downloaded a hack that allows for access to the developers' console for the game poked around a bit and discovered three game types:

• Global Thermonuclear War -- The object is to  capture, then detonate a nuclear bomb.
• One Flag -- Basic capture-the-flag: grab the banner in the middle and bring it back to your base.
• VIP --  Defend the VIP. Or, if you’re on the other team, kill the VIP.

They are apparently playable on the Afghan and Favela maps, but haven't been played on others. They may not work for all maps.” Whether these three game-types will be included in future DLC, are abandoned content "left over" on the disc, or are clever decoys left by the programmers for some unknown reason remains to be seen.

Source: ModernWarfail2.com