Team Fortress 2 (TF2), the game PC Gamer magazine's editors have called the most fun game ever made, is now available for the Mac via Steam, a leading online platform for games with over 25 million accounts worldwide. Like all the titles Valve has brought to the Mac platform, TF2 features Steam Play allowing gamers to make one purchase to play the game on both the PC and Mac. In addition, TF2 supports cross platform play -- so Mac gamers can play against/with PC gamers. Those who purchase TF2 for the Mac will receive a free set of "earbuds" for their favorite player character. Purchase the game this weekend can save 50% off the regular. Or, try the game now via the Team Fortress 2 Free Weekend happening now on Steam. In addition to all the TF2-Mac goodness, a new single player training mode has been rolled out for both PC and Mac. Don't have Steam? Get it here.