Valve’s sent over a list of titles that have been added to Steam for Mac today, that allow folks to play multiplayer with pals on PC.
This set of titles that allow for PC vs. Mac cross-platform gaming include Killing Floor, Altitude, and Madballs in Babo: Invasion.
For a limited time, Killing Floor will be offered at 33 percent off its regular price and an Altitude “Free Weekend promotion” is available now on Steam, and you can pick it up at 50 percent off for the moment as well.
Madballs in Babo: Invasion is also available at 50 percent off.
Sam and Max: The Devils Playhouse Episode 2 and Hearts of Iron 3 were also added, with more titles coming next week.
Head on over to Steam and see for yourself.