The second big update to Portal 2 will feature “an easy to use in-game map editor that will let users design, build and share their own single-player and co-op test chambers with the community, who will be able to view, play and vote on them with a simple click,” Valve revealed today. It will be out in early 2012. We shared more details earlier this week (time warp!).
https://kotaku.com/valve-tinkering-with-an-excellent-portal-2-feature-that-5851007
