A massive cache of internal Valve builds has reportedly leaked online, totaling 12 terabytes of data from 2003 to 2013. The files include beta builds of Counter-Strike: Global Offensive, Left 4 Dead, and Portal 2. Notably, the 2009 Portal 2 beta features GLaDOS pre-recordings and personality cores instead of Wheatley.

Additionally, data miners have discovered the "Weaponizer," an unfinished weapon linked to the cancelled Half-Life 2: Episode 3. The leak also contains files for F-STOP, a cancelled Aperture Camera precursor to Portal 2. The archive is linked to Valve's Steam2 content-server infrastructure.

Valve has been contacted for comment.