Windows
OS:Â Windows Vista or later
Processor:Â 2 GHz Dual Core (Core 2 Duo 2.4 GHz or Athlon X2 2.7 GHz) CPU
Memory:Â 2 GB RAM
Graphics:Â 256 MB Video Memory NVIDIA GeForce 8600 GT / ATI Radeon HD 2600 XT or greater
Hard Drive:Â 20 GB available space
Sound Card:Â DirectX compatible sound card
Mac
OS:Â OS X 10.7.5 (Lion), 10.8.5 (Mountain Lion)
Processor:Â 2.0 GHz Intel Core 2 Duo (Dual-Core)
Memory:Â 4 GB RAM
Graphics:Â AMD HD4000 / NVIDIA 9000 Series
Network:Â Broadband Internet connection
Hard Drive:Â 24 GB available space
Additional Notes:Â NOTICE: The following graphics cards are not supported: ATI X1xxx series, ATI HD2xxx series, Intel GMA series, NVIDIA 7xxx series, NVIDIA 8xxx series. The following cards require you to have 8GB of system RAM: NVIDIA 320M, NVIDIA 9400 and Intel HD3000.
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.
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.
