Half-Life 2

Backrooms director Kane Parsons was inspired by the Portal series, and it looks like the franchise's long-awaited revival is upon us.

Fans even spotted a second revealing exchange between Valve developers.

A Portal movie has been in development since 2013 headed up by J.J. Abrams and his production company, Bad Robot.

User data seemingly unaffected, but plenty of material related to games released between 2003 and 2013 have been leaked.