Steam leak exposes unreleased builds from Valve and third-party publishers across a decade

Roughly 12–13 TB of Steam games, betas and prototypes from 2003–2013 has leaked, VGC reported on 30 August 2026. The archive covers everything uploaded to Steam in that period, not just Valve titles. Beta material from Batman: Arkham Asylum, Dragon Age: Origins and Call of Duty 4: Modern Warfare is among the exposed content, according to Aesthetic Gamer.