Perpetual Testing Initiative

The 10 best Portal 2 co-op maps

Phil Savage at

We recently gave you our selection of the best Portal 2 single player maps and campaigns available on the Steam Workshop. There's some great feats of level design in that list, but if you really want to see mapmakers skills stretched to the limit, you have to turn to co-op.

With two brains and four portals available, the levels must be exponentially more complicated. They need to emphasise teamwork, provide an inventive challenge and be tightly crafted so as to stop players exploiting their way through. With that in mind, I enlisted the help of my Perpetual Testing Partner to dig out the ten best co-operative maps around. As always, if you've a favourite that's not listed, let us know about it.


The best Portal 2 singleplayer maps and campaigns

Phil Savage at

Thanks to the Perpetual Testing Initiative DLC's easy-to-use and fun-to-play-with level editor, Portal 2 has a near-endless supply of new puzzles for players to enjoy. Since its release, over 200,000 new community made levels have been uploaded to the Steam Workshop, ready for a one-click download and integration into Cave Johnson's pan-dimensional scam. Whether you love lasers, revere repulsion gel or crave companion cubes (don't we all?) there's sure to be something out there.

Here's our pick of the best ten community-created puzzles available, and a further five fulsome campaigns. Obviously, with so many to choose from, some are bound to have fallen through the cracks. Be sure to share your favourites in the comments, and keep your eyes peeled for our top co-op maps in the very near future.


Portal 2 Perpetual Testing Initiative is live, download the first PCG puzzle

Chris Thursten at

The Portal 2 Perpetual Testing Initiative DLC is now live, and as promised you can download the first PC Gamer-themed test chamber from the Steam Workshop.

It's a little bit more complicated than the puzzle I built in fifteen minutes for our hands-on video, but that's not saying much. At least you can't beat this one with only two portals. Thanks for pointing that out, though, everyone.

The new level editor is a great tool and we're excited to see what the community manages to achieve with it. Getting started on your own test chambers? Share your efforts, tips and recommendations in the comments thread below.


Portal 2 "Perpetual Testing Initiative" release date announced

Tyler Wilde at

Valve announced today that Portal 2's in-game puzzle maker will be called "Perpetual Testing Initiative," and will be available free on May 8 for PC and Mac. The DLC will be capable of publishing puzzles directly to Steam Workshop, where users can browse, install, and vote on the community's creations.