Right click MW3 in your game library and go to properties.
Click the "Local Files" tab and then click "Verify Integrity of game cache"
Wait for it to do stuff and should re download any files that dun goof'd or are missing. If it comes back saying everything is fine (It didn't re-download any files) then I suggest you make a thread on the steam forums.
Click the "Local Files" tab and then click "Verify Integrity of game cache"
Wait for it to do stuff and should re download any files that dun goof'd or are missing. If it comes back saying everything is fine (It didn't re-download any files) then I suggest you make a thread on the steam forums.
edited 2011-11-12 18:52:25