Bullet-Time Portal Game

Portal momentum puzzles where time moves only when you move.

Portals × Bullet-Time

First load downloads the game (~60–120 MB), then it's cached.
Needs a desktop browser with WebGPU or WebGL2. Keyboard + mouse.

Tab opens the mode panel · F1–F8 toggle modes live

What happens when Portals × Bullet-Time collide

  • Freeze mid-flight between portals and plan your exit.
  • Place the second portal while the world is frozen.
  • Your momentum carries across every switch: toggle modes mid-air and keep your speed.

The modes

Portals

Two linked portals that keep your momentum. Bullets, cars and boards all pass through. Inspired by 2007-era portal puzzlers.

Controls: 8 portal gun · LMB blue · RMB orange

Bullet-Time

The world clock follows your input. Stand still and everything freezes. Inspired by shooters where time moves only when you move.

Controls: Time scales with how much you move

FAQ

Can I play Portals × Bullet-Time online for free?
Yes. This is a GameMash preset that runs in your browser with WebGPU or WebGL2. It's free, there's no account, and you don't need any game files.
Can I add more modes?
Yes. Press Tab to open the mode panel, or F1–F8 to switch modes live. You can add Skate, Platformer, Shooter and more without losing your momentum.
Is it made from the original games?
No. Every mechanic is a clean-room implementation written from observed behaviour and published values, with original code and CC0 or self-made assets. The modes are inspired by 2007-era portal puzzlers and shooters where time moves only when you move.

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