Ars Technica
A 12TB Steam “teraleak” spills more than a decade of lost PC gaming history
Sunday, August 30, 2026
A leaked collection of Valve internal files and source code from multiple games has circulated online. The leak includes cut content from Portal 2, developer notes related to Half-Life 2: Episode 3, and materials from other titles spanning over a decade of development. Valve has not publicly commented on the leak as of the publication date.
