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Valve Experienced a Massive 12TB Leak

Summary by Checkpoint
Someone has leaked more than 12TB of Valve’s data, marking one of the largest data breaches in video game history. And right up front, no, there isn’t anything about when we’re getting Half-Life 3. Dubbed the “teraleak” or “terarelease”, this gigantic 12TB leak involves titles on the Steam store from 2003 to 2013. Much relates to Valve titles from the era like Team Fortress 2, Dota 2 and Left 4 Dead, but there’s plenty from other developers too.…

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Archivists have accessed Valve's gaming platform Steam through a public access point. The data exposed includes unfinished games and early versions of popular titles.

·Ljubljana, Slovenia
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The full scope of the 12TB Steam leak, known as "TerraLeek," has expanded. It has been revealed that it includes not only a prototype of Valve's 'Portal 2,' but also prototypes of other companies' titles such as 'Mafia II' and 'GTA3.' Legal risks have been pointed out due to the inclusion of third-party content.

A collection of previously unearthed game documents has suddenly surfaced, causing a huge stir in the community! Steam, the largest game platform operated by Valve, distributed games using a system called "Steam2" from 2003 to 2013. Then, in February 2013, Va…

For years, a point of access to Steam's old infrastructure remained open to the public without anyone seeing it. Individuals ended up finding it, and they extracted between 12 and 13 terabytes of files covering everything that went through the store between 2003 and 2013. The community has already named the Teraleak case. No break-in in history. These servers dated from the time Valve was distributing its games in home formats, before switching …

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Korben broke the news on Wednesday, September 2, 2026.
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