Valve has announced that Team Fortress 2 (TF2) is now available for the Mac via Steam, featuring Steam Play which allows gamers to make one purchase and 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 play TF2 on the Mac will receive a free set of "earbuds" for their player character. Purchase the game this weekend on either platform and save 50% off the regular price. Or, you can try it 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.