New Portal 2 DLC that lets you create and share your own levels launches on Mac and PC from 8th May, developer Valve has announced.
Titled Perpetual Testing Initiative, it's a free download featuring a "simplified puzzle maker" that lets you publish levels to Steam Workshop where other players can browse, play and vote on them.
Valve hasn't announced a console release for the expansion.
It's the second major DLC release for last year's rapturously-received puzzle sequel, following the Peer Review add-on last October.
Will you support Eurogamer?
We want to make Eurogamer better, and that means better for our readers - not for algorithms. You can help! Become a supporter of Eurogamer and you can view the site completely ad-free, as well as gaining exclusive access to articles, podcasts and conversations that will bring you closer to the team, the stories, and the games we all love. Subscriptions start at £3.99 / $4.99 per month.