12 TB of Valve Data Leaked, Possibly Including Half-Life 2 Episode 3

A reported 12 TB collection of Valve data has leaked online, with researchers uncovering what appear to be internal game builds and assets spanning a decade-long period from 2003 onward. The Valve material appears to include early versions of Portal 2, Left 4 Dead, Counter-Strike: Global Offensive, and a canceled Portal sequel code-named F-Stop, with a possible connection to Half-Life 2: Episode 3 still being investigated.

Aug 30, 2026 - 09:17

A reported 12 TB collection of Valve data has leaked online, with researchers uncovering what appear to be internal game builds and assets spanning a decade-long period from 2003 onward. The Valve material appears to include early versions of Portal 2, Left 4 Dead, Counter-Strike: Global Offensive, and a canceled Portal sequel code-named F-Stop, with a possible connection to Half-Life 2: Episode 3 still being investigated.

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