An update has been released for Portal 2.

- Security and exploit fixes. Reported in part by Justin G. (sigsegv) and Linus S. (PistonMiner).

An update has been released for Portal 2.

- Security and exploit fixes. Reported in part by Justin G. (sigsegv) and Linus S. (PistonMiner).

An update has been released for Portal 2 and Portal 2 Authoring Tools.

- Updated to latest Steamworks SDK to fix the map publishing tool.

An update has been released for Portal 2.

- Show an error dialog if the game is launched while Steam isn't running.

An update has been released for Portal 2.

- Show an error dialog if the game is launched while Steam isn't running.

An update has been released for Portal 2.

- Fixed security issues reported by Justin Taft from One Up Security, LLC.

An update has been released for Portal 2.

- Fixed a full-bright material in cavern areas.
- Integrated some security patches from other Source games.

- Fixed a content issue that could cause certain textures to look very bright in some levels

- Added co-op maps to Sixense MotionPack DLC.
- Fixed an issue caused by PS3 MotionPack players inviting non-MotionPack PC players into a game.

Changes:
- Fixed an issue Mac users were having when trying to compile community maps they had created.