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Minimum
For Windows XP

* 3D hardware accelerator card required - 100% DirectX 9.0c-compliant 256 MB video card*
* Intel Pentium 4 3.0 GHz or Intel Core 2 E6300 or AMD Athlon 64 3000+
* 1 GB of RAM
* 8 GB of uncompressed hard disk space (plus 400 MB for the Windows swap file and 12 KB free for saved games)
* DirectX 9.0c (Included)
* DirectX 9.0c-compliant true 16-bit sound card
* Windows XP-compatible mouse, keyboard
* Windows XP-compatible 6x speed DVD-ROM drive (600 K/sec sustained transfer rate)

*Supported Chipsets for Windows XP
All NVIDIA GeForce 7800 GT 256 MB RAM and better chipsets (excluding 8400 cards)
All ATI Radeon X1800 256 MB RAM and better chipsets (excluding X1800 GTO, Radeon HD2400, Radeon HD2600, and Radeon HD3450)
Motherboard integrated video chipsets not supported

For Windows Vista

* 3D hardware accelerator card required - 100% DirectX 9.0c-compliant 256 MB video card*
* Intel Pentium 4 3.0 GHz or Intel Core 2 E6300 or AMD Athlon 64 3000+
* 1 GB of RAM
* 8 GB of uncompressed hard disk space (plus 400 MB for the Windows(R) swap file and 12 KB free for saved games)
* Windows Vista compliant true 16-bit sound card
* DirectX 9.0c (Included)
* DirectX 9.0c-compliant true 16-bit sound
* Windows Vista compatible mouse, keyboard
* Windows Vista-compatible 6x speed DVD-ROM drive (600 K/sec sustained transfer rate)

*Supported Chipsets for Windows Vista
All NVIDIA GeForce 7800 GT 256 MB RAM and better chipsets (excluding 8400 cards)
All ATI Radeon X1800 256 MB RAM and better chipsets (excluding X1800 GTO, Radeon HD2400, Radeon HD2600, and Radeon HD3450)
Motherboard integrated video chipsets not supported

Recommended
For Windows XP

* 3D hardware accelerator card required - 100% DirectX 9.0c-compliant 256 MB video card*
* Intel Core 2 Duo E8400 and or AMD Athlon 64 X2 6000+
* 1.5 GB of RAM
* 8 GB of uncompressed hard disk space (plus 400 MB for the Windows  swap file and 12 KB free for saved games)
* DirectX 9.0c (Included)
* DirectX 9.0c-compliant true 16-bit sound card
* Windows XP-compatible mouse, keyboard
* Windows XP-compatible 6x speed DVD-ROM drive (600 K/sec sustained transfer rate)

*Recommended Chipsets for Windows XP
NVIDIA GeForce 8800 GT, ATI Radeon  HD 3850

For Windows Vista

* 3D hardware accelerator card required - 100% DirectX  9.0c-compliant 256 MB video card*
* Intel Core 2 Duo 3.0GHz or AMD Athlon X2 4800+ or higher processor
* 1.5 GB of RAM
* 8 GB of uncompressed hard disk space (plus 400 MB for the Windows swap file and 12 KB free for saved games)
* DirectX 9.0c (Included)
* DirectX 9.0c-compliant true 16-bit sound card
* Windows Vista compatible mouse, keyboard
* Windows Vista compatible 6x speed DVD-ROM drive (600 K/sec sustained transfer rate)