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Massive 12TB Steam Data Leak Includes Abandoned Game Assets

A data leak exceeding 12 terabytes has exposed Steam game builds from 2003-2013. Initial findings include assets related to the cancelled Half-Life 2: Episode 3.

30 August 2026
Massive 12TB Steam Data Leak Includes Abandoned Game Assets

A substantial data leak, amounting to over 12 terabytes, has exposed game builds uploaded to Valve's Steam platform between 2003 and 2013. The sheer volume of the data means a complete analysis is ongoing.

Among the early discoveries are assets reportedly linked to the cancelled Half-Life 2: Episode 3. The leak also contains content cut from Portal 2, and a version of a game called F-Stop, which is set in the Portal universe and built around a camera mechanic.

The exposed data includes titles from third-party developers as well. Early versions of installments from the Call of Duty and Resident Evil series have been unearthed, alongside builds of Mirror's Edge, Batman: Arkham Asylum, and Dragon Age: Origins.

Further details are expected to emerge as the data is processed. Security experts have noted that such extensive leaks can potentially reveal sensitive information about ongoing or unreleased projects.

Original source: theverge.com