Leaked F-Stop Assets Let Valve Cut Content Team Assemble Playable Build
The cancelled Portal prequel can now be played in full after its assets and source code surfaced, according to Rock Paper Shotgun.
Assets and source code for F-Stop, the cancelled Portal prequel, have leaked, allowing what exists of the game to be played in full. The playable version was assembled by the Valve Cut Content team together with a number of leakers, according to Rock Paper Shotgun.
F-Stop's central mechanic involves photographing an object so that it disappears into the photo, then bringing it back, sometimes at a different scale, in order to solve puzzles. That mechanic is the reason the project has long been compared to Superliminal.
The leak did not arrive all at once. In August, roughly 12TB of Steam data surfaced, but it held only F-Stop's assets, without the source code or map data needed to make the project run.
According to the article, the leaker of the F-Stop mapsrc asked for $1000 before handing over the data. F-Stop remained mysterious for years; in 2020 a semi-official deeper look at the project showed a concept close to Superliminal, and parts of it were eventually incorporated into Portal 2.
Quick answers
What is F-Stop?
F-Stop is a cancelled Portal prequel from Valve built around a camera-based puzzle mechanic. Parts of it were later incorporated into Portal 2.
Is F-Stop playable now?
Yes. After assets and source code leaked, the Valve Cut Content team and leakers assembled a playable version of what exists of the game.
Did the August Steam leak include F-Stop's source code?
No. The roughly 12TB Steam leak in August contained only F-Stop's assets, not its source code and map data.