Requires a 64-bit processor and operating system
OS: 64-bit Windows 7 or Higher
Processor: Intel® Core™ i3-2105 or AMD® Phenom™ II X3 720
Memory: 8 GB RAM
Graphics: Nvidia® GeForce™ GTX 560 Ti or AMD® ATI Radeon™ HD 5870 (1 GB VRAM)
DirectX: Version 11
Network: Broadband Internet connection
Storage: 35 GB available space
Sound Card: DirectX 9 sound device
Additional Notes: Multiplayer is compatible between Windows, Mac and Linux versions.
Mac
Requires a 64-bit processor and operating system
OS: macOS High Sierra 10.13.3
Processor: Intel® Core™ i5-4670
Memory: 8 GB RAM
Network: Broadband Internet connection
Storage: 35 MB available space
Additional Notes: Multiplayer is compatible between Windows, Mac and Linux versions.
Linux
Requires a 64-bit processor and operating system
OS: 64-bit Ubuntu 18.04 LTS and higher or SteamOS
Processor: Intel® Core™ i3-3240 CPU
Memory: 8 GB RAM
Graphics: Nvidia® GeForce™ GTX 560
Network: Broadband Internet connection
Storage: 35 GB available space
Additional Notes: Multiplayer is compatible between Windows, Mac and Linux versions.
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.