Recommended:

OS: x86 or x64 bit versions of Microsoft Windows XP/Vista/Win7
Processor: AMD/Intel dual-core processor running at 2.4 GHz
Memory: 1GB for MS Windows XP and 2GB for Vista/Win7
Hard Disk Space: 1GB
Video Card: ATI/Nvidia dedicated graphic card with at least 256MB of dedicated VRAM and with at least DirectX 9.0c and Shader Model 4.0 support. ATI Radeon HD 3800 series and NVIDIA Geforce 8800GT.
DirectX®: 9.0c, June 2010 update
Sound: Integrated or dedicated DirectX 9 compatible soundcard.

SkyDrift screenshots