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A publicly accessible API endpoint exposed 12TB of Steam2 game depots from 2003 to 2013
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A 12TB archive of Steam game depots from 2003 to 2013, including pre-release builds, was leaked after being accessed through a publicly available API endpoint.
This leak exposes a massive amount of previously lost or inaccessible game history, including prototypes and cut content from Valve and third-party publishers. For engineers, it highlights how legacy infrastructure transitions, like Valve's shift from Steam2 to SteamPipe, can leave historical data exposed through unsecured or forgotten public endpoints.
Written by elseif from the cluster below · every claim links back to a sourceThe three things worth knowing
The leak contains 12TB of Steam2 content server data covering every game version uploaded between 2003 and 2013.
Data miners claim the archive was obtained through a publicly accessible API endpoint that required no passwords.
The archive includes previously lost pre-release, prototype, and playtest builds of games like Portal 2.
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