RAM: 1 Gb For Windows Xp / 1.5 Gb For Windows Vista)
OS: Windows Vista - Service Pack 1 / Xp - Service Pack 3 / Windows 7
Video Card: 256mb Nvidia 7900+ / 256mb Ati X1900+
Free Disk Space: 16 Gb
Dedicated Video RAM: 256 Mb
The actual recommended requirements are much higher. The minimum requirements would allow you to play the game, but it would not be the best experience.