Minimum System Requirements OS : Microsoft Windows Vista SP1 or Windows 7 Processor: Intel Pentium D 2.6GHz or AMD Athlon 64 X2 3800+ Memory: 1GB RAM (2GB for Vista) Free Disk Space: 5 GB Video Card: Shader Model 3.0 and 256MB RAM (ATI Radeon X1600/nVidia GeForce 6800) Sound Card: DirectX Compatible