OS 64-bit Windows 7 or 64-bit Windows 8 (8.1) or Windows 10
Processor
Intel CPU Core i5-2500K 3.3GHz, AMD CPU Phenom II X4 940
Memory
8 GB RAM
Graphics
Nvidia GPU GeForce GTX 660, AMD GPU Radeon HD 7870
DirectX
Version 11
Storage
6 GB available space
Sound Card
Integrated
Go to: http://store.steampowered.com/ and download STEAM client
Click "Install Steam" (from the upper right corner)
Install and start application, login with your Account name and Password (create one if you don't have).
Please follow these instructions to activate a new retail purchase on Steam:
Launch Steam and log into your Steam account.
Click the Games Menu.
Choose Activate a Product on Steam...
Follow the onscreen instructions to complete the process.
After successful code verification go to the "MY GAMES" tab and start downloading.