

Play the most popular maps in the world, or just what your friend created last night. Now that we’re adding the Steam Workshop to Portal 2, you’ll be able to browse a virtually endless stream of community-crafted puzzles, then install and play them with just one click from any web browser.

They’re hard to find, hard to install, and hard to manage. There are already hundreds of incredible Portal 2 puzzles in the wild, but chances are you haven’t played them. Maps can be saved and shared with friends, and can also be uploaded to the Steam Workshop, where thousands of other maps can be found uploaded by other users. The add-on is free if you own Portal 2 and allows users to develop their own maps for the game.

Portal 2 is finally getting something new! Valve is launching a Portal 2 map / puzzle maker called the Perpetual Testing Initiative (PeTI) on May 8th via the Steam Store on Mac and PC.
