Steam account required for game activation and installation
PC System Requirements
MINIMUM:
OS: Windows Xp / Vista / Windows 7
Processor: 1 GHz
Memory: 256 MB RAM
Graphics: 32 MB 3D video card
Mac System Requirements
MINIMUM:
OS: Mac OS X 10.5 or higher
Processor: 1 GHz
Memory: 256 MB RAM
Graphics: 32 MB 3D video card