The March 2008 issue of the Official Xbox Magazine features Left 4 Dead on its cover, revealing the Xbox 360 version for the first time. OXM visited Valve where they played the Hospital and Cornfield scenarios on the PC and they also had the chance to see Cornfield running on Xbox 360 development hardware. This is the first time that the press has been able to see the Xbox 360 version, which still has some ways to go to match the PC.
The other big news from this article is that a third game company named Certain Affinity (in addition to Valve and Turtle Rock Studios) is also handling the Xbox 360 version. Certain Affinity is a small game developer in Austin, Texas, founded in November 2006 by a 10-year Bungie veteran, Max Hoberman. Their first product was Halo 2's Blastacular Map Pack for Bungie and Microsoft.
Finally, OXM states the following: "EXCLUSIVE: The PC and 360 versions of Left 4 Dead will ship simultaneously, but there will be no PS3 edition."