Left 4 Dead 2 celebrates its 15th anniversary this weekend by going free-to-play until November 18th. Jump in for the first time to battle zombie hordes with your friends, or come back for the opportunity to finally earn the "Good Guy Nick" achievement!

An update has been released for Left 4 Dead 2.

- Fixed several crash and remote code execution exploits.
- Fixed a crash on some NVIDIA graphics cards when shader detail is set to High.

An update has been released for Left 4 Dead 2.

- Player connect message is no longer networked to clients, to prevent exposing player IP addresses.

An update has been released for Left 4 Dead 2:

- Fixed a regression that blocked taking screenshots.

An update has been released for Left 4 Dead 2:

- Fixed a memory leak exploit in lobby chat.
- Prevent running arbitrary script code on a remote server.
- Prevent a network exploit that gave the client access to server settings.
- Implementation example for a new beta feature in Steam.

An update has been released for Left 4 Dead 2:

- Fixed an exploit that could block a player from connecting to any game, whether online or local.
- Fixed two exploits that used invalid content to crash the game or prevent it from loading.
- Fixed a memory leak when rejecting invalid content.

An update has been released for Left 4 Dead 2:

- Fixed a bug that prevented the community server list from appearing.

An update has been released for Left 4 Dead 2:

- Fixed two exploits that could remotely crash servers.
- Fixed music not playing at the main menu on Linux.

An update has been released for Left 4 Dead 2:

- Fixed another exploit where malicious network packets could severely degrade server performance.
- Fixed a client exploit that could cause long server stalls.
- Fixed a potential crash if a Charger failed to return to valid nav for an extended period of time.
- Fixed a rare hang from ray traces encountering NaN values.