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

A massive archive containing over 12 terabytes of data and builds for every game uploaded to Steam between 2003 and 2013 has been leaked online. Due to the immense size of the cache, the full contents remain partially unexplored, but early findings have already uncovered significant assets, including material related to canceled projects and third-party games.

Among the most prominent discoveries are assets tied to the canceled Half-Life 2: Episode 3, including a version of the Weaponizer intended for the game. Investigators have also unearthed cut content from Portal 2, such as alternative introduction and GlaDOS sequences, deleted dialogue that changes the context of Companion Cubes, and a build of F-Stop, a separate game set in the Portal universe centered around a camera mechanic.

In addition to Valve's internal projects, the archive contains titles from various third-party developers. Early versions of entries in the Call of Duty and Resident Evil franchises have been found alongside builds for Mirror’s Edge, Batman: Arkham Asylum, and Dragon Age: Origins. As users continue to sift through the vast amount of data, further revelations from the archive are expected to come to light.