Introducing the Perpetual Testing Initiative (PeTI) for Portal 2, which combines the powerful, easy-to-use Puzzle Maker and full Steam Workshop integration. Available free for the PC and Mac on May 8th. Visit www.thinkwithportals.com for more information.
Link to us http://360.mmgn.com/Videos/Portal-2-Perpetual-Testing-Initiative-8JFJ
Video by: Heller
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