12 TB of Valve Data from 2003–2013 Leaks Online

Around 12 TB of Valve data spanning 2003 to 2013 have leaked online. The community is already digging through the files for cancelled content, early builds, and other forgotten developments. Early finds include a 2009 Portal 2 start screen and possible traces of Half-Life 2: Episode Three. If the archive contains prototypes and old Valve work, there's a lot to explore.