OS: Windows® XP/Vista™ 32-bit Processor: Intel Pentium® 4 2.6 GHz or Athlon 64 +2800 (Intel Pentium 4 3.0 GHz or Athlon 64 +3200 recommended) Memory: 1 GB RAM under XP and 2 GB RAM under Vista (2GB recommended) Graphics: NVIDIA GeForce 6800 256MB or ATI Radeon X800 256MB or better (NVIDIA GeForce 7900 512MB or ATI Radeon X1900 512MB or better recommended) Sound: DirectX version 9.0c-compatible sound card Hard Drive: 5.5 GB DirectX®: DirectX version 9.0c (included) or higher Input Devices: OS-supported keyboard and mouse