Scratch That Itch With The 'Portal 2' Map Creator

If we learned one thing from "Portal 2," it's that designing mind-bogglingly difficult challenge rooms and then having people solve them feels really, really good. Until today, players have had to scratch their creative itches with the boring ol' map creator from the original "Portal." But no more! Valve unleashed the "Portal 2" authoring tools [...]

Source: http://multiplayerblog.mtv.com/2011/05/11/portal-2-map-creator/

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