12TB Steam teraleak spills PC gaming history
Archived — this story has rotated out of today’s deck. It is kept here in full.
The gist
A 12TB Steam teraleak dumped Valve's internal files from 2003-2013. It exposes cut Portal 2 content and possible Half-Life 2: Episode 3 hints.
Background
The leak, dubbed 'Steam2 Teraleak,' surfaced online over the weekend, containing internal builds of games uploaded to Steam between 2003 and 2013. It reportedly includes thousands of depots with pre-release, prototype, and playtest versions from Valve and third-party publishers. The cutoff aligns with Valve's transition from Steam2 to SteamPipe in 2013, which changed how updates were delivered. Reports suggest the data came from an old, publicly accessible endpoint, not a hack.
How it unfolded
- Aug 29, 2026The 12TB archive began circulating online, containing internal Steam files from 2003-2013.
- Aug 30, 2026Ars Technica and other outlets reported on the leak, highlighting cut Portal 2 content and possible Half-Life 2: Episode 3 material.
- Aug 31, 2026Coverage expanded, with reports noting the leak was not from hacking but an exposed public endpoint.
Who’s saying what
- Insider Gaming
- Insider Gaming quoted Scolcer saying 'There has been no hacking. This is 100% VALVe's fault,' and that the data was '100% accessible to the public.'
- GamesRadar+
- GamesRadar+ reported the archive includes 'never-before-seen versions of Portal 2' and materials possibly related to Half-Life 2: Episode 3.
Still unverified
The exact contents and authenticity of the leak are not fully verified; reports are based on community analysis and early coverage.