Delete it and it will grow. Mold an amorphous organism into any shape by pruning its cells. New cells will immediately grow, allowing you to traverse a mysterious world across brain-twisting obstacles, overcome swarms of bizarre mutated creatures, and understand the true nature of the devastation from which you emerged.

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.