http://bugs.winehq.org/show_bug.cgi?id=20736
--- Comment #47 from Owen Rudge owen@owenrudge.net 2009-11-25 21:55:52 --- (In reply to comment #45)
i launched Steam, logged in, waith till store is up fully and gone to Desktop and tried twice launch MW2 clicking in it's icon in the Desktop...the tried also twice launch MP version.
OK, it looks like the process is launched, and an exception occurs after that, so the problem is with the game itself. I would check the AppDB entry for MW2 (http://appdb.winehq.org/objectManager.php?sClass=version&iId=18348&i...) and open up a new bug if necessary, so we can continue to concentrate on L4D2 here.