Though Portal 2 was released over a year ago, it's good to know that Valve is still committed to their wildly addictive puzzle FPS, with the new Perpetual Testing Initiative DLC promising a feature that gamers have been crying out for since the original Portal. As explained by Cave Johnson, it's time to build some test chambers! Something which will be made all the more simple by the games streamlined map editor. Good to know you won't need to be an experienced 3D modeler to get your test chambers up and running!
Anyhow, check out the hilarious trailer, and start plotting our your own tests. Got any ideas yet?