Minimum requirements

Supported OS: Windows 7 SP1, Windows 8, Windows 8.1 (64 bit versions only).
Processor: Intel Core i5-2500K @ 3.3 GHz or AMD FX-8350 @ 4.0 GHz
RAM: 6 GB RAM
Video Card: NVIDIA GeForce GTX 680 or AMD Radeon HD 7970 (2 GB VRAM)
DirectX: DirectX June 2010 Redistributable 
Hard Drive Space: 50 GB available space​​
Sound Card: DirectX Compatible Sound Card with latest drivers 
Peripherals: Keyboard, mouse, Xbox 360 controller (or compatible) optional.

Recommended requirements

Supported OS: Windows 7 SP1, Windows 8, Windows 8.1 (64 bit versions only).
Processor: Intel Core i7-3770 @ 3.4 GHz or AMD FX-8350 @ 4.0 GHz or better
RAM: 8 GB RAM
Video Card: NVIDIA GeForce GTX 780 or AMD Radeon R9 290X (3 GB VRAM)
DirectX: DirectX June 2010 Redistributable
Hard Drive Space: 50 GB available space​​
Sound Card: DirectX 9.0c compatible sound card with latest drivers
Peripherals: Keyboard, mouse, Xbox 360 controller (or compatible) optional.

Supported Video Cards at Release Time:  
Laptop models of these desktop cards may work as long as their performance is on-par with the minimum configuration.