The Steam 'teraleak' extends far beyond Valve games, including prototypes of third-party titles like Mafia 2 and Grand Theft Auto 3: 'This may be one of if not the biggest leaks to occur'

The Steam 'teraleak' extends far beyond Valve games, including prototypes of third-party titles like Mafia 2 and Grand Theft Auto 3: 'This may be one of if not the biggest leaks to occur' On Saturday, information began circulating online about a massive, 12-terabyte leak of Valve data that included prototypes of numerous classic Valve games. But it seems what is now being dubbed the "teraleak" contained far more than just old builds of Portal 2 and possible weapons from Half-Life 2: Episode 3, and may include prototypes of countless third-party games released on Steam over a ten-year period. Specifically, the leak consists of Steam file groups known as 'depots' which were stored on Steam's servers between 2003 and 2013. On the Valve side, dataminers have already unearthed a complete version of Portal 2's 2009 "beta", as well as prototypes for Left 4 Dead, Counter-Strike: Global Offensive, and even some files from Valve's cancelled puzzler F-STOP.