A 12-terabyte dump of Steam data reveals prototypes and builds of third-party classics like GTA 3 and Mafia 2, plus unreleased Valve content, rewriting game history.

A massive dump of Steam2 server data exposes cut Portal 2 content, prototypes, and decade-old secrets from 2003-2013.

The massive leak includes beta builds and finished games, exposing unreleased code and raising piracy and security risks for developers.

A 12TB archive of Steam builds from 2003 to 2013 exposes Valve's lost Half-Life 2: Episode 3, the camera-driven F-Stop game, and years of untouched third-party prototypes.