If you haven’t played Valve’s amazing sequel to its arguably even more awesome original Portal game, now may be the time to jump in. Valve has updated the map editor for Portal 2 to include co-operative levels, called test chambers. Now you can create these yourself and share with the vibrant Portal 2 community on Steam for Mac, according to today’s news from Valve.
Over 170,000 single-player levels have already been created and shared by Portal 2 fans, in what Valve calls the Perpetual Testing Initiative since the game was released last May for Mac and PC. The innovative 2-player co-op mode is only available in Portal 2.
The free update to all current Portal 2 owners includes a quick play feature, allowing you to access top-rated, popular community maps.
To make it even better, Valve is giving current Portal 2 owners a 75 percent off coupon to give to other Steam members to purchase Portal 2, so that you can get your friends to join in the mayhem..