12TB of Steam Files Leak as a Decade’s Worth of First- and Third-Party Game Data Is Exposed
Data includes both completed and unfinished game builds published on Steam between 2003 and 2013.
An estimated 12 terabytes of data from Steam has been leaked, encompassing a decade's worth of game information published on the platform between 2003 and 2013. According to content creator Gabe Follower, the leaked data was obtained through a publicly accessible endpoint, and the extraction process did not involve any hacking. Valve shifted to a new storage system in 2013, which explains why the data set ends at that point.
The 12TB of data includes every game on the Steam library from 2003 to 2013, not just Valve-developed titles. This massive collection contains full games, beta versions, and even early prototype versions that were uploaded to Steam during the 10-year period. Some of the discovered information includes a pre-release build of Left 4 Dead with altered HUD, voice lines not present in the final release, and changed sections of the game map.
As archivists, enthusiasts, and others explore the leaked data, it is likely that additional information will be unearthed. At present, Valve has not addressed the data leak.
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