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● LIVE Updated 3h ago · 9 sources tracked

Fans Rebuild Valve's Scrapped Portal Prequel "F-Stop" From Three Separate Leaks

Community members have created a playable version of F-Stop, a Portal prequel Valve cancelled in 2007. Modders combined data from three separate leaks to assemble the game. While a 12 TB Steam2 archive leaked in August provided most assets, it lacked the necessary source code and mapsrc required for functionality. Enthusiasts stitched these disparate pieces together to restore the prototype, making the scrapped title accessible to the public for the first time.

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⚡ Key Developments & Real-Time Context
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  • ✓ Valve cancelled the Portal prequel F-Stop in 2007.
  • ✓ A playable version of F-Stop was created by combining three separate leaks.
  • ✓ Most assets for the game were contained in a 12 TB Steam2 archive leaked in August.
🛡️ Source Corroboration: 9 independent reporting domains (95% confidence) ⏱ Read time: ~2 min

What changed

Modders combined three separate leaks to make the cancelled 2007 prototype fully playable.

Live updates

  1. Modders rebuild cancelled Portal prequel F-Stop from multiple leaks

    Community members have created a playable version of F-Stop, a Portal prequel Valve cancelled in 2007. Modders combined data from three separate leaks to assemble the game. While a 12 TB Steam2 archive leaked in August provided most assets, it lacked the necessary source code and mapsrc required for functionality. Enthusiasts stitched these disparate pieces together to restore the prototype, making the scrapped title accessible to the public for the first time.

    Why it matters

    F-Stop existed as a prototype before Valve scrapped the project. The recent resurfacing allows players to experience a lost piece of the Portal franchise's development history.

    What is confirmed

    • Valve cancelled the Portal prequel F-Stop in 2007.
    • A playable version of F-Stop was created by combining three separate leaks.
    • Most assets for the game were contained in a 12 TB Steam2 archive leaked in August.

    Still unconfirmed

    • The current playable version of F-Stop is nearly complete.
    • The August Steam2 leak lacked the game's source code and mapsrc.

    What to watch next

    • Valve's official response to the leak
    • Release of the compiled build to the wider public
    Sources used for this update (9)
    1. The Verge — A fully playable version of Portal prequel F-Stop leaked
    2. Kotaku — Valve’s Cancelled Portal Prequel F-Stop Has Leaked
    3. Engadget — All The Leaks For The Portal Prequel F-Stop Have Been Compiled Into A Playable Game
    4. TechPowerUp — Fans Rebuild Valve's Scrapped Portal Prequel "F-Stop" From Three Separate Leaks
    5. Rock Paper Shotgun — What remains of canned Portal prequel white whale F-Stop is now fully playable thanks to modders and some big leaks
    6. 80 Level — Valve's Long-Lost Portal Prequel Prototype Resurfaces Online
    7. kotaku.com — Valve's Cancelled Portal Prequel F-Stop Has Leaked - Kotaku
    8. www.techpowerup.com — Fans Rebuild Valve's Scrapped Portal Prequel "F-Stop" From ...
    9. vgtimes.com — Valve's Canceled Portal Prequel Has Leaked Online
    confidence 95%
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