Enormous 12TB Steam leak includes abandoned Half-Life 2: Episode 3 assets

Over 12 terabytes of data, containing builds of every game uploaded to Steam between 2003 and 2013, has been leaked. We don't know everything in the archives yet because of its massive size. But people have already dug up assets related to the canceled Half-Life 2: Episode 3, content cut from Portal 2, and a build of a game called F-Stop that's set in the Portal universe but is built around a camera mechanic. The leak also includes titles from third-party developers. Early versions of Call of…