Portal 2 blog recommends, because there's big news in the world of science. Valve has added co-op to the Perpetual Testing Initiative – the company's fancy name for the hit game's level creator. Meaning, armchair designers can now publish co-op maps for users to consume.
Valve has also added a "Quick Play" feature that creates a "never-ending, auto-generated" playlist of the highest rated user-developed maps. "It has literally never been easier to figuratively jump in and literally play some Portal," the wordsmiths at Valve claim.
As an added treat, Valve is offering current owners of Portal 2 a 75% off coupon for a second copy of the game. Just the thing you'll need to get a friend in on the action. Who are we giving out copy to? American astrophysicist and director of the Hayden Planetarium Neil deGrasse Tyson, of course! He knows a thing or two about intricate bodies of work. As soon as he accepts our Steam friend request.