Over a decade since it was cancelled, Valve's unreleased Portal prequel, F-Stop has been revived via an unusual source: an indie developer.
F-Stop, which began life as a Valve experiment before it was set to be the next Portal game following the release of the Orange Box in 2007, revolved around taking pictures in the game world, with the pictures then used to create in-game objects. Portals and the Portal gun were nowhere to be seen.
F-Stop was eventually canned and Valve went on to release Portal 2 in April 2011. Gameplay of F-Stop was never officially released, with Valve keeping its cards close to its chest in case it fancied returning to the in-game camera mechanic. But now, over a decade later, an indie developer has said it has permission from Valve itself to show off the F-Stop mechanic using F-Stop's source code - and it released a video revealing how it all works.
