Steam has been around on the PC for a long time now. The service was both loved and hated by many, but the cool factor of being able to download new games was undeniable. Even if it took way longer to download than it would take to drive to the store and buy frequently.
Steam has recently landed on the Mac and the service has new cross-platform multiple player titles. Steam is announcing that new cross platform titles that include Killing Floor, Altitude, and Madballs in Babo: Invasion.
In celebration, Steam is offering Mac gamers Killing Floor at 33% off for a limited time and Altitude is heading for a free weekend promotion with the game 50% off regular price. More Mac titles are set to hit Steam next week.