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A massive data breach has exposed over 12 terabytes of content from Valve’s Steam platform, potentially affecting thousands of video games released before 2013. The incident, discovered Saturday and dubbed the Steam2 Content Server Dump, includes internal files from Valve’s own titles alongside games from numerous third-party developers. Files from Portal 2, the unreleased Half-Life 2: Episode 3, Grand Theft Auto V, and Dragon Age: Origins are among the compromised materials, making this one of the largest gaming industry leaks on record.
According to content creators investigating the breach, the data was not stolen through hacking but rather discovered on an unprotected website, suggesting inadequate security measures by Valve. The exposed files originate from Steam2, the company’s legacy content distribution system used between 2003 and 2013 before being replaced by SteamPipe. This limited timeframe means approximately 2,122 games that launched on Steam during that decade were potentially affected by the exposure.
Early discoveries from the leaked archive reveal substantial unreleased content, including beta builds, cancelled game projects, and cut material from released titles. Players have already shared findings such as early versions of Left 4 Dead 2, the cancelled Portal prequel F-Stop, and unused Portal 2 features like alternative dialogue and plot elements. As the community continues examining the massive dataset, additional revelations are expected to emerge gradually, similar to previous major gaming leaks. Valve has been contacted for official comment on the incident.
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Originally reported by Mashable →
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