A video preview of the Perpetual Testing Initiative DLC for Portal 2 has been released by Steam user Doogiehoogie. It’s posted below. The DLC allows users to create, share, and play Portal 2 puzzles using the puzzle maker. Users can then publish maps to the Steam Workshop so that others can browse, vote on, and select to play them. Selected puzzles will automatically be downloaded and installed inside Portal 2. It releases on PC and Mac May 8.