In the dark and mysterious world of Closure, only what you see exists. Manipulate lights to phase objects in and out of reality in this multiple-award-winning puzzle game. Play as a strange spider-like demon who explores the stories of three human characters through beautiful, eerie environments such as a decrepit factory, a murky forest, an abandoned carnival, and the strange, surreal realm that connects them together.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.