F-Stop reconstructed build is playable after leaks

A reconstructed version of Valve's canceled Portal prequel, F-Stop, is playable after community members merged several leaks. The build is approximately 99% complete, though some textures, assets, and character voice lines are still missing, according to the Valve Cut Content Discord community.

Image: TechPowerUp

The majority of the assets appeared in August during a 12 TB Steam leak. In late October, community members found the missing source code and mapsrc map files on their Discord server. After verifying the files, the team merged them into a single build.

The game features an Aperture Science camera that allows players to photograph objects to project and scale them elsewhere to solve puzzles. The story campaign can be beaten in under an hour. F-Stop was developed in 2007 during a three-month period as part of Gabe Newell's Directed Design Experiments. Many of the project's characters, dialogue, and mechanics were later reworked for Portal 2. Valve has not commented on the project, and there is no indication of an official release.