OS: Windows XP, Vista Processor: Intel Core 2 Duo, AMD Athlon X2, or faster Memory: 1GB+ (Windows XP); 2GB+ (Vista) Graphics: Shader Model 3.0 or higher; NVIDIA GeForce 7800 Series, ATI Radeon HD 2400 Pro, or higher VRAM: 256MB or more (Not guaranteed to run when shared with main memory) DirectX®: DirectX 9.0c or higher Hard Drive: 13.0GB free space Sound: DirectSound Support (DirectX 9.0c or higher) Other Requirements: Internet connectivity Internet connection required for game activation. To play online, activate an online account using a product key. Limit one account per key. One product key included. Games for Windows–LIVE System Requirements: Multiplayer play and other LIVE features included at no charge; games may offer additional downloads that may require additional fees. LIVE is not available in all countries, visit http://www.gamesforwindows.com/live/countries for more information. Features and system requirements may change without notice. Subject to Terms of Use (at http://www.gamesforwindows.com/live/termsofuse ). Broadband Internet service required (sold separately). Some broadband services may not work with LIVE and performance may vary. Under 13 requires parental consent. See http://www.gamesforwindows.com/live for full details. You must accept the enclosed License Agreement.