Valve has just fallen victim of a gigantic data breach that may just rival the great Nintendo Gigaleak.

As explained by GabeFollower, 12TB of Steam data has been compromised. These comprise of internal video game builds that were placed in team servers, dating from 2003 to 2013.
Apparently, this breach did not happen due to a hack or social engineering, but because Valve left key vulnerabilities open. The person who found this data didn’t even own all the games that were part of the breach.
The breach ends at 2013, when Valve switched from Steam2 to the SteamPipe content distribution system. The leaked builds include both Valve’s and many third party games, so you can expect tons of previously unknown information about old games to come to light now.
GabeFollower put the spotlight on F-Stop, the cancelled prequel to Portal. In this game, the player used an Aperture Science Laboratories Camera to take items in photographs and make them materialize in front of them.
Fans are also looking at non-Valve games, such as a January 2011 build for Spec Ops: The Line. This is definitely only the start of these leaks.
