Minimum:

OS: Windows XP, Vista, Windows 7, Windows 8
Processor: AMD Athlon 64 Processor 3800+ 2.4Ghz or better, Intel Pentium 4 530 3.0Ghz Processor or better
Memory: 2 GB RAM
Graphics: NVIDIA 7800GT 256MB graphics card or better, ATI Radeon X1900 256MB graphics card or better that supports Shader Model 3 and has at least 256 MB of VRAM
DirectX: Version 9.0c
Storage: 2 GB available space
Sound Card: 100% DirectX 9.0C compliant sound card or onboard sound
Additional Notes: NOTICE: Intel HD 4000 chipset is not supported

The Magic Circle videos