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.

An update has been released for Left 4 Dead 2. - Configuration files are no longer loaded from addon vpks. These configuration values were sometimes used for malicious purposes, and all changes remained in the user's local settings even after the addon was disabled or removed. When necessary, addon authors should inform users of any required configuration changes in the description on the workshop page.

An update has been released for Left 4 Dead. - Additional fixes to prevent malicious servers from executing restricted console commands on clients.

An update has been released for Left 4 Dead. - Fixed a client crash in weapon sounds. - Fixed a bug that allowed malicious servers to execute restricted console commands on players. - Fixed a bug that allowed malicious servers to prevent players from executing console commands.

An update has been released for Left 4 Dead 2. - Fixed a server lagging exploit. - Fixed some reported security exploits. - Fixed key bindings not displaying correctly when using the Xbox 360 controller. New EMS scripting features: - Added a new interface for reading/writing entity network and data table fields from script. Use "script_help NetProp" for interface details. - New script function "TakeDamage( amount, type, attacker )". - New script function "GetNetworkIDString()". - Added "timeofday" keyfield to the world entity. - Support auto_spawn of witch bride.