Minimum System Requirements
Operating System (*): Windows XP, Vista, or 7.
Processor: Pentium 4 - 3.0 GHz, or AMD processor.
RAM: 1GB (1024 MB)
Graphics Card: Shader Model 2.0 capable, ATI 9600, NVidia 6600 or better.
Sound: DirectX 8.1 compatible.
HDD: At least 8 GB (Not including the Free Source SDK, installed separately)
Recommended System Requirements
Operating System (*): Windows XP, Vista, or 7.
Processor: Intel Core 2 Duo 2.4GHz or AMD equivalent.
RAM: 1 GB (1024 MB)
Graphics Card: Shader Model 3.0 capable, ATI X1600, NVidia 7600 or better.
Sound: DirectX 9.0c compatible.
HDD: At least 8 GB (Not including the Free Source SDK, installed separately)
