Linux
Business Model Commercial
Minimum RAM Required 4 GB
Media Type Download
Minimum Video Memory Required 1 GB
Input Devices Supported Keyboard, Mouse
Steam Achievements, Cloud, Steamplay

Macintosh
Business Model Commercial
Minimum CPU Class Required Intel Core 2 Duo
Minimum OS Class Required Mac OS X 10.6.4
Minimum RAM Required 2 GB
Media Type Download
Minimum Video Memory Required 256 MB
Input Devices Supported Keyboard, Mouse
Steam Achievements, Cloud, Steamplay

Windows
Business Model Commercial
Minimum CPU Class Required Intel Core 2 Duo
Minimum OS Class Required Windows XP SP3
Minimum RAM Required 2 GB
Media Type Download
Minimum DirectX Version Required DirectX 9.0c
Minimum Video Memory Required 256 MB
Input Devices Supported Keyboard, Mouse
Steam Achievements, Cloud, Steamplay


Technical information contributed by MrMamen (8279) and jaXen (44940)