Updates to Left 4 Dead have been released. The updates will be applied automatically when your Steam client is restarted. The major changes include:

Left 4 Dead

• Added Mac support for Left 4 Dead
  
• In Versus mode Tanks will spawn in stasis until a human player takes over. Tanks in stasis are invisible and invulnerable, and won't move or attack
  
• Tank speed is no longer reduced when on fire
  
• Allow players on the Infected team to manually spawn during finales
  
• Added a vote option toggle All-Talk
  
• Any Special Infected that causes a Survivor to stumble into a "ledge hang" situation will receive 50 points
  
• Bullets that first pass through an infected character before striking a Survivor are now ignored as friendly fire
  
• In Versus mode car alarms will now trigger anytime a Special Infected pulls or stumbles a Survivor into an alarm car
  
• Protected console commands that can be used to lag or crash servers
  

Updates to Left 4 Dead have been released. The updates will be applied automatically when your Steam client is restarted. The major changes include:

Left 4 Dead

• Allow thirdperson settings in cooperative game modes
  
• Added support for Russian audio in The Sacrifice
  
• Game correctly recognizes the audio language set in Steam
  
• Fixed "Sacrifizzle" achievement
  

Updates to Left 4 Dead have been released. The updates will be applied automatically when your Steam client is restarted. The major changes include:

• Fixed Linux dedicated servers failing to run in a path with uppercase characters
  

Updates to Left 4 Dead have been released. The updates will be applied automatically when your Steam client is restarted. The major changes include:

• Fixed demos crashing on load
  

Updates to Left 4 Dead have been released. The updates will be applied automatically when your Steam client is restarted. The major changes include:

• Fixed audio client concommands that could lag a server.
  
• Fixed a remote DLL loading exploit (MS KB2264107).
  
• Fixed a crash when disconnecting a rcon connection due to an invalid password when multiple sessions were already connected.
  

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: Last Man On Earth
  
• Blocked a map exploit at the start of The Passing
  
• Fixed a crash if a Spitter lost her spit target mid-attack
  
• Updated video config for new NVIDIA cards
  

Updates to Left 4 Dead and 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

• Fixed an issue where servers wouldn't relist after the master server was bounced
  

Left 4 Dead 2

• Fixed a Linux dedicated server crash