Windows</br>OS: Windows Vista – Service Pack 1 / Windows XP – Service Pack 3</br>Processor: Intel Core 2 Duo 1.8GHz, AMD Athlon X2 64 2.4GHz</br>Memory: 1.5GB XP / 1.5GB Vista</br>Graphics: 256MB Nvidia 7900 / 256MB ATI X1900</br>DirectX Version: DirectX 9.0c Compliant Card</br>Hard Drive: 16GB of Hard Disc Space</br>Sound Card: 5.1 Channel Audio Card</br>Other Requirements: Initial activation requires internet connection; Online play requires log-in to Games For Windows – Live and Rockstar Games Social Club (13+ to register); software installations required including Sony DADC SecuROM, Adobe Flash, DirectX, Games for Windows – LIVE, and Internet Explorer.</br>