A massive cache of Valve data has reportedly leaked online, appearing to include Portal 2's elusive beta build and a potential weapon from Half-Life 2: Episode 3

A massive cache of internal builds from Valve has reportedly leaked online, including beta builds of several classic Valve titles and possible weapons from Half-Life 2's cancelled third episode. The leak, which began circulating on Saturday and comes from an unknown source, includes 12 terabytes of data currently being sifted through by data miners. Thus far, data from Counter-Strike: Global Offensive, Left 4 Dead, and Portal 2 have all been claimed to feature in the leak. Information about the Weaponizer appeared in a separate leak that occurred in 2011, inside a directory labelled "ep3", while a gun that resembles the Weaponizer was shown in footage of Episode 3 that appeared in Valve's 20th anniversary documentary on Half-Life 2 (via Gamerant).