Updates 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