Fans assemble playable build of cancelled Portal prequel
Leakers have pieced together a playable version of F-Stop, a Portal prequel that Valve cancelled. The build draws mostly on a 12 TB Valve data leak from August, with source code and map data added after being posted to the Valve Cut Content Discord this week. The assembled game still lacks textures and dialogue, and its campaign runs for less than an hour in total. Valve has not announced any official release.
Key facts
- F-Stop was developed during Valve's 2007 Directed Design Experiments, a three-month period.
- The leaked compilation also includes early assets for Left 4 Dead, Portal 2 and Half-Life.
- The camera mechanic lets players capture objects with a photo and relocate them.
- Some F-Stop elements later appeared in Portal 2.
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Why it matters
Shows how much unreleased Valve material remains outside the company's control.
What changed
First published from The Verge and Engadget