OS: Windows 7/Vista/XP Processor: 2GHz CPU (Pentium 4 or equivalent) Memory: 1GB RAM (2GB for Vista and Windows 7) Hard Disk Space: 1.5Gb HDD Video Card: 512MB DirectX 9.0c compatible video card with Pixelshader 3.0 support DirectX®: DirectX 9.0c or later Sound: DirectX 9.0c compatible sound card Additional: Local Co-op requires a controller