12TB Valve Archive Leak Includes Portal 2 Builds

Eurogamer posted about a 12TB Valve archive leak that contains early Portal 2 builds from 2009 along with references to Half-Life 2: Episode Three. The linked article states that the leaked archive also includes early Left 4 Dead content. Fans are searching the files for additional Half-Life 2: Episode Three material according to the report. The post links to coverage on Eurogamer.net describing the archive as old Valve builds that have surfaced online.