Left 4 Dead 2 infects Macs tomorrow

Just under five months after Valve began its Mac initiative, the suburban Seattle developer is bringing one of its biggest hits to Apple's operating system. Starting tomorrow, Left 4 Dead 2 will be available for Macs via the Steam download service, where the PC edition currently sells for $20. As with all titles bought on Steam, gamers who own the PC version of Left 4 Dead 2 can download the Mac edition for free.

As with many of its PC games, Valve is offering all previously released Left 4 Dead 2 downloadable content for free with purchase of the PC or (starting tomorrow) the Mac edition of the game, including the add-ons The Passing, The Sacrifice, and No Mercy. A similar deal will be offered with the Mac version of the original Left 4 Dead, which Valve hopes to have ready by Halloween.

The double-platinum Left 4 Dead 2 expands upon the frenetic survival horror shooter formula established in the 2008 original. Gamers again find themselves making due with a variety of found weapons, ranging from rifles to chainsaws, and are tasked with surviving the indomitable infected mob. The game features five new campaign maps that can be played in five different modes, as well as extensive co-op support.

For more information, check out GameSpot's previous coverage of Left 4 Dead 2.