An update has been released for Left 4 Dead 2. - Security and exploit fixes. Reported in part by Justin G. (sigsegv) and Linus S. (PistonMiner).

An update has been released for Left 4 Dead. - Security and exploit fixes. Reported in part by Justin G. (sigsegv) and Linus S. (PistonMiner).

An update has been released for Left 4 Dead. - Fixed a new bug causing some items to not transition between levels.

An update has been released for Left 4 Dead 2. - Fixed a new bug causing some items to not transition between levels. - Added missing model precaches to Left 4 Dead 1 Mutation mode.

An update has been released for Left 4 Dead 2. - Prevent a crash if a material overflows the index buffer. - Zombie population fixes for Left 4 Dead 1 Mutation modes. - Fixed some material properties on Left 4 Dead 1 common infected models.

An update has been released for Left 4 Dead 2. - Fixed a crash after failing to load a map. - Fixed a crash caused by missing materials.

An update has been released for Left 4 Dead 2. - Fixed a crash in particle systems loaded from Add-ons.

An update has been released for Left 4 Dead 2. - Fixed security issues reported by Justin Taft from One Up Security, LLC.

An update has been released for Left 4 Dead 2. - Fixed a potential remote code execution exploit.

An update has been released for Left 4 Dead. - Fixed a potential remote code execution exploit.