About this game

Zen Studios, in collaboration with Aperture Laboratories and Valve, is proud to present the “Aperture Science Heuristic Portal ® Pinball Device”, proving that persistent experimentation is not only the hallmark of good science for the benefit of mankind, but also incalculably fun! Features Guide Chell and Wheatley through test chambers by navigating portals, using aerial faith plates, defeating turrets and facing other obstacles. Battle against GLaDOS as you attempt to escape the facility and reach the surface. Team up with ATLAS and P-Body for their Cooperative Testing Initiative Multiball. Discover Ratman's hidden mini playfield and wreak havok on the Turret Factory.

How to activate

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 "LIBRARY" tab and start downloading.