OS: Windows 7/8.1/10 (32-bit versions)
Processor: Intel Core Duo E6600 @ 2.4GHz
Memory: 4 GB RAM
Graphics: Intel 4400, GeForce GT 8800, AMD Radeon HD 4650
DirectX: Version 11
Storage: 4 GB available space
Sound Card: Windows Compatible Sound card
Mac
OS: OSX 10.10 Yosemite
Processor: Intel Core i5 @2.7Ghz
Memory: 2 GB RAM
Graphics: Nvidia GT 640M, AMD Radeon HD 5750, Intel HD Graphics 6100
Storage: 4 GB available space
Linux
OS: Ubuntu 14.04, Mint 18.2
Processor: Intel Core i5 @3.3Ghz
Memory: 4 GB RAM
Graphics: Nvidia GTS 8800, AMD Radeon HD 4650, Intel HD Graphics 6100
Storage: 4 GB available space
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.