Infinity Ward’s gotta be pretty proud about this one. Call of Duty: Modern Warfare 2 was this year’s most-pirated game. Prestigious indeed. Not a surprise of course, considering it was the biggest game of 2009, but I personally know people who turned to piracy simply because the game lacked some notable features (read: dedicated servers) that most PC games have.

Modern Warfare 2 boasts over 4.1 million unauthorized downloads of the PC version alone, according to TorrentFreak, more than doubling last year’s “winner” Spore. Trailing Modern Warfare 2 in the most-pirated category are Sims 3 and Prototype.

Fortunately for Activision, the game continues to be a top-selling title and the best-selling of 2009 on PlayStation 3 and Xbox 360. If that means alienating the PC gaming community, so be it I guess, right?