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● LIVE Updated 1h ago · 12 sources tracked

A fully playable version of Portal prequel F-Stop leaked

A playable version of F-Stop, a cancelled Portal prequel from Valve, is now available after fans combined three separate leaks. The game, which originally dates back to 2007, features camera-based mechanics. While one source claims the leak is 99% complete, other reports describe the current build as a rough version. This release ends the status of the title as lost media nearly 20 years after Valve scrapped the project.

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⚡ Key Developments & Real-Time Context
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  • ✓ F-Stop is a cancelled camera-based Portal prequel developed by Valve.
  • ✓ A playable version of the game was created by combining three separate leaks.
  • ✓ The game was cancelled in 2007.
🛡️ Source Corroboration: 12 independent reporting domains (90% confidence) ⏱ Read time: ~2 min

What changed

Fans compiled three separate leaks into a fully playable build of the 2007 game.

Live updates

  1. Playable version of cancelled Portal prequel F-Stop leaked

    A playable version of F-Stop, a cancelled Portal prequel from Valve, is now available after fans combined three separate leaks. The game, which originally dates back to 2007, features camera-based mechanics. While one source claims the leak is 99% complete, other reports describe the current build as a rough version. This release ends the status of the title as lost media nearly 20 years after Valve scrapped the project.

    Why it matters

    F-Stop was intended to expand the Portal universe before its cancellation. Its recovery allows players to experience a scrapped piece of Valve's development history.

    What is confirmed

    • F-Stop is a cancelled camera-based Portal prequel developed by Valve.
    • A playable version of the game was created by combining three separate leaks.
    • The game was cancelled in 2007.

    Still unconfirmed

    • The leaked version of F-Stop is 99% complete.
    • The current playable build is a rough version and the closest thing to a release players will see.

    What to watch next

    • Official comment from Valve regarding the leak
    • Release of a more polished fan-reconstruction
    • Discovery of additional leaked assets to fill remaining gaps
    Sources used for this update (14)
    1. kotaku.com — Kotaku - Gaming Reviews, News, Tips and More.
    2. www.engadget.com — GameStop Is Hoping PS5 Pro Buyers Are Desperate Enough To Pay $500 Over MSRP - Engadget
    3. www.theverge.com — Here’s Nintendo’s overview trailer for the Ocarina of Time remake.
    4. businessupturn.com — Black sea shipping under fire: Russia claims drone hit on vessel bound for Chornomorsk · Business Upturn
    5. www.rockpapershotgun.com — Can the SideWinder Game Pad, Microsoft's first game controller, work on modern PCs? I bought three of them to find out
    6. cashwalklabs.io — GM will switch to Nasdaq from the NYSE on Nov. 17
    7. The Verge — A fully playable version of Portal prequel F-Stop leaked
    8. Kotaku — Valve’s Cancelled Portal Prequel F-Stop Has Leaked
    9. Engadget — All The Leaks For The Portal Prequel F-Stop Have Been Compiled Into A Playable Game
    10. TechPowerUp — Fans Rebuild Valve's Scrapped Portal Prequel "F-Stop" From Three Separate Leaks
    11. shattered.io — Portal Prequel F-Stop Leaks at 99% Complete [2026]
    12. www.theverge.com — A fully playable version of Portal prequel F-Stop leaked
    confidence 90%
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