OS: Windows XP/Vista Processor:700MHz (minimum, lo-res mode); 1+GHz (recommended, hi-res mode) Memory:256MB (minimum, lo-res mode); 768+MB (recommended, hi-res mode) Graphics: DirectX-compatible; 16MB (minimum, lo-res mode), 92+MB (recommended, hi-res mode) 16-bit or 32-bit color mode (256 colors may not work) - Note: For hi-res mode, you need at least 768MB of RAM and at least 92MB of video RAM, as well as a desktop resolution greater than or equal to 1000 pixels in height. DirectX®: 8.1 (required, lo-res mode); 9.0c+ (required, hi-res mode) Hard Drive: 250+MB Sound: DirectX-compatible Internet: Internet connection is required to register/unlock game trials