Valve Steam Server Error Exposes 12 TB of Internal Game Files
2 sources across 2 countries · Brazil · France
Who reported this
- Tecnoblog
- Next.ink
What the colours mean
- Left
- Centre-left
- Centre
- Centre-right
- Right
- A hatched block means the outlet is affiliated with, or controlled by, a state.
Political lean describes where an outlet sits within the politics of its own country. It is never a position on a single global scale.
Political lean is comparable inside one country and not across them, which is why the bar groups by country first. Publicly funded broadcasters are not marked as state-linked.
The owner of each outlet is listed as a matter of record, not as a judgement about the outlet.
Every outlet covering this story shares the same political lean; read with that in mind.
A maintenance error at Valve exposed more than 12 terabytes of internal Steam files hosted between 2003 and 2013. The leak occurred because an old server used for storage remained publicly accessible without a password. This server belonged to the Steam2 infrastructure, which utilized proprietary NCF and GCF formats before Valve migrated to the HTTP based SteamPipe system in March 2013. The data is currently available via BitTorrent, making it unlikely that the company can fully remove it from the internet.
The leaked archive contains over 10,000 repositories including production builds, prototypes, and test versions. For Valve's own titles, the files reveal assets from the canceled Half Life 2: Episode 3, such as the Weaponizer tool and Arctic maps. Other discoveries include early builds of Portal 2 with abandoned mechanics like purple gel, as well as materials from the canceled F Stop project. Early versions of Left 4 Dead, Dota 2, and Counter Strike: Global Offensive are also present.
Beyond Valve's internal projects, the leak includes development builds from third party partners. These include titles such as Call of Duty, Resident Evil, Mirror's Edge, Batman: Arkham Asylum, Dragon Age: Origins, Spore, and Sonic 4 Episode 2. While the leak is extensive, one source notes that Valve's financial impact is likely limited given the platform's high revenue in early 2026.
How each side framed it
- Centre
- Both center leaning outlets framed the event as a significant historical discovery for the gaming community rather than a malicious security breach.
Sources
100% of the statements in this article were traced back to the source articles listed above.