Minimum: Microsoft Windows® 2000/XP. (Windows® 95/98/ME/NT not supported) Pentium IV 1.4GHz (or AMD AthlonXP 1700+ processor or higher). 256MB System Memory. 3D Hardware Accelerator Card Required - 100% DirectX® 9.0c compatible with 128 MB and Shader model 2.0. (GF FX 5700 or ATI 9500) 100% DirectX® 9.0c compatible 16-bit sound card and latest drivers 4.0GB of uncompressed free disk space (plus 600MB for Windows® 2000/XP swap file) 100% Windows® 2000/XP compatible mouse, keyboard and latest drivers. Recommended: Pentium® IV 2.8GHz with Dual Core Technology (or Athlon 64 series). 512MB System Memory. 3D Hardware Accelerator Card Required - 100% DirectX® 9.0c compatible with 256 MB and Shader model 2.0. All nVidia® GeForce™ 7 series or higher. Sound Blaster® X-Fi series or higher. Optimal: Pentium® D Processor with Dual Core Technology (or Athlon 64 X2 series). 1GB System Memory. All nVidia® GeForce™ 7800 series or higher. Sound Blaster® X-Fi series or higher.