Minimum: OS: Windows® XP / Vista™ / Windows® 7 Processor: Pentium D 3.0 GHZ or capable processors Memory: 1GB (2GB for multiplayer) Graphics: ATI Radeon X1600XT or capable graphics adapter supporting PixelShader 2.0 or nVidia Geforce 8800GTS or better DirectX®: DirectX 9.0c Hard Drive: 500MB space free Sound: DirectSound® compatible