About Left 4 Dead

Minimum:
* Windows XP, Vista or Vista64
* 3.0 GHz Pentium IV CPU
* 1 GB RAM
* 128 MB VRAM
* Radeon 9600 or GeForce 6600 GPU
* 7.5 GB HD space

Recommended:
* 2.4 GHz Core 2 Duo CPU
* GeForce 7600 GPU