Gaming News
Valve Steam2 Teraleak Exposes 13 Terabytes of Game Data
Developing
Photo: Marta Branco, Pexels All clips and posts below are embedded from their original sources.
By the numbers: this timeline documents 4 events from Aug 29, 2026 to Aug 31, 2026, drawn from 3 sources.
“No hacking involved, just verified that everything in Steam2 Teraleak was obtained via a publicly accessable [sic] endpoint. It's Valve's fault…”
via mashable.com
Why it matters
The massive data leak exposes a decade of internal development history, proprietary source files, and unreleased prototypes for numerous first- and third-party games housed on Steam between 2003 and 2013. The incident raises significant security questions regarding how legacy content servers were configured and left exposed to the public.
Background
Steam2 was Valve's previous content distribution system used to deliver game updates through its digital storefront starting in 2003, before it was phased out after the introduction of SteamPipe in 2013.
The leaked archive spans a decade of game development history, encompassing internal files, early builds, and cut concepts for iconic Valve titles such as Portal 2, Left 4 Dead 2, and cancelled projects like Half-Life 2: Episode 3 and the F-Stop prequel.
The timeline
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Valve Steam2 Data Leak Surfaces Online
Roughly 13 terabytes of Steam depot data dating from 2003 to 2013 leaked online, containing prototype builds and files for Valve first-party titles and third-party games, according to Kotaku and social media reports.[1]
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Creators Claim Leak Stemmed From Unprotected Server
Valve content creator Scolcer and community figure Gabe Follower claimed on X that no hacking was involved, stating instead that the data was obtained via a publicly accessible and unprotected endpoint hosted by Valve.[2]
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Youtube video claims all Valve games leaked and shares everything known
According to a post by Gabe Follower on YouTube, all Valve games have been leaked and the video shares everything known about the leak.[3]
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Kotaku Details Portal 2 and Half-Life Discoveries
Kotaku reported that community members examining the leaked files reportedly uncovered early 2009 and 2010 Portal 2 prototype builds featuring scrapped mechanics, along with a weapon model allegedly linked to the cancelled Half-Life 2: Episode 3.[1]
Our read of the evidence
Partly documented. The timeline lists four events, each reported by outlets such as Kotaku, Mashable and a YouTube post, with no primary source confirming any of them. Since the information rests solely on secondary reports and pending community cataloging, the evidence is only partly documented.
Our rating counts evidence, not opinions about anyone: events confirmed by a primary source (the person's own post, their official site, a court or government record) weigh most, then how many independent outlets report the story.
What happens next
Further cataloging of the 13-terabyte archive by community researchers and fans, according to Kotaku and Mashable.
Frequently asked
What is the status of the Valve Steam2 data leak?
As of August 31, 2026, community researchers and fans are actively cataloging the 13 terabytes of leaked archives while awaiting an official response from Valve, according to Kotaku and Mashable.
How was the Valve Steam2 data leaked?
According to content creators Scolcer and Gabe Follower, the data was found on a publicly accessible and unprotected endpoint rather than being obtained through a malicious hack.
What games are included in the Steam2 leak?
According to Mashable and Kotaku, the leak includes internal data, builds, and cut content from Valve titles like Portal 2, Left 4 Dead 2, and cancelled projects, alongside third-party games hosted on Steam prior to 2013.
Did the leak contain playable builds of Half-Life 3?
According to Kotaku, no playable build of Half-Life 3 or Half-Life 2: Episode 3 was discovered in the leak, though researchers found a model for an Episode 3 weapon and other related filenames.
More related drama (4)
Sources (3)
Cite this timeline
This timeline compiles 4 dated events from 3 sources. If it helped your reporting, cite it:
GenZHype. “Valve Steam2 Teraleak Exposes 13 Terabytes of Game Data.”
GenZHype, 27 September 2026,
https://genzhype.com/drama/valve-steam2-teraleak-exposes-13-terabytes-of-game-data/.