Locked inside of Bunker 58 surrounded by unidentified creatures trying to kill you. There is only one way to survive, and that is to kill anything that attacks you. You are set with a selection of weapons ranging from melee to guns, and even have a torch for the use of light. How much do you value your life, and how much are you willing to kill to keep it?

— Activation Details —

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.