pdates to Left 4 Dead 2 have been released. The updates will be applied automatically when your Steam client is restarted. The major changes include:
Left 4 Dead 2
New Mutation: Hunting Party
Fixed door exploit in No Mercy
Now Allow thirdperson settings in cooperative game modes
Fixed add-on campaigns not always appearing in the campaign selection screen
Restored dedicated server support for add-on campaigns
Fixed some rendering artifacts on Mac
Added support for Russian audio in The Sacrifice and No Mercy
Game correctly recognizes the audio language set in Steam