MINIMUM:

OS: Windows Vista, Windows 7 or Windows 8 
Processor: AMD Athlon x2 Dual Core or Intel Core 2 Duo Processor @ 2.4Ghz 
Memory: 4 GB RAM 
Graphics: AMD HD5450 or Nvidia GT430 or Intel HD4000 with 1GB of VRAM 
Hard Drive: 35 GB available space 
Sound Card: DirectX Compatible soundcard

RECOMMENDED:

OS: Windows Vista, Windows 7 or Windows 8 
Processor: AMD FX-8150 or Intel Core i5 4670K 
Memory: 8 GB RAM 
Graphics: AMD R9 290 or Nvidia GTX780 
Hard Drive: 35 GB available space 
Sound Card: Direct X compatible soundcard