
Valve have revealed the next update for the ever popular Portal 2 will include 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. Other players will be able to download, play and rate for creations all via a simple in-game system much like Bungie did with Forge in Halo.
They havent mentioned which platforms it will come to as of yet but its expected to be released early next year.