12TB Steam Data Leak Reveals Decade of Internal Game Builds and Canceled Projects

Over 12 terabytes of Steam content-server data from 2003–2013 has leaked, exposing internal builds, cut assets, and unreleased projects from Valve and third-party publishers. Early versions of Call of Duty, Resident Evil, Mirror's Edge, Batman: Arkham Asylum, and Dragon Age: Origins appear, alongside canceled Valve projects including Half-Life 2: Episode 3 assets and a Portal-universe game called F-Stop.