OS: Windows 7 / Vista / XP
Processor: 3.0 GHz P4, Dual Core 2.0 (or higher) or AMD64X2 (or higher)
Memory: 1GB XP / 2GB Vista
Hard Disk Space: At least 7.6 GB of Space
Video: Video card must be 128 MB or more and should be a DirectX 9-compatible with support for Pixel Shader 2.0b (ATI Radeon X800 or higher / NVIDIA GeForce 7600 or higher / Intel HD Graphics 2000 or higher).
Audio: DirectX 9.0c compatible
Portal 2 Update 1:
- Fixed unrecoverable black screen in elevator save
- Fixed infinite loop on Mac OSX server
- Fixed Mac OSX font rendering and glyph corruption
- Fixed GC memory leak
- Various localization content improvements
- Support for English subtitles in Turkish builds
- Minor string/interface glitches
- Fixes for multiple crashes
- Improved detection and handling for various errors and/or crashes
- Activated UI to enable joystick in-game
Portal 2 Update 2:
- Fixed and added additional error-handing code for crashes in the renderer