Borderlands 2 has overtaken Dota 2 and Team Fortress 2 as Steam's most popular game, comfortably ahead of both Valve's offerings by about 17,000 s. At present, Borderlands 2 can boast around 77,000 concurrent players.
What's that, Modern Warfare 3? You're having a free-weekend? Borderlands 2 don't care. It's got a nearly 50,000 player advantage, and all those phat lootz.
Also of note, Civilization V has crept into fourth place with about 26,000 s thanks to strong preorders for XCOM making theirstretch goals and unlocking free copies of the game for all Steam s who preordered. Way to go, strategy games. Make those shooters tremble.