Leak of Internal Valve Data

A 12-terabyte cache of internal Valve builds from 2003-2013 has leaked, containing beta versions of Counter-Strike: Global Offensive, Left 4 Dead and the complete 2009 Portal 2 beta, which features GLaDOS-guided test chambers and prominent personality cores. The archive also includes the unfinished Weaponizer weapon linked to the cancelled Half-Life 2: Episode 3, as well as non-functional files from the abandoned puzzle project F-STOP, a precursor to Portal 2.