arcwright Get early access

Describe a game. Arcwright builds it, plays it, and proves it works.

AI agents build it live in the editor. A bot plays every build and finds what's broken. Ships to Mac, Steam Deck and Windows.

  • 479 tests
  • 10/10 bot wins
  • 60 fps
  • Mac = Deck

From one sentence to a game that's proven to work.

The Arcwright editor with Harbor Run open

It builds

AI agents build your game inside the editor while you watch. Every step can be undone.

It plays

A bot plays every build through the real controls, again and again, on different seeds.

It proves it

When something breaks, it names the exact cause, gets fixed, and every build ships with a report.

Made in Arcwright. Played by the bot.

Castaway

Survival · built from one sentence · bot won 10/10

Circuit

Racing · 5/5 races finished

Harbor Run: speedboats at a jetty at dusk

Harbor Run

Boats · same finish on Mac and Deck

Lights out: a dark corridor lit by a flashlight

Lights Out

Horror · in development

479automated tests
217/217replay checkpoints matched
22,909crash tests run
385commits since Oct 4
Castaway running on a Steam Deck

Built on a Mac. Plays on a Steam Deck.

Same game, same seed, same result on both. Castaway: 218.8 s on each. Harbor Run: 2:12.78 on each.

It makes its own 3D objects.

From one reference sheet to a finished model, checked against the reference from every side.

Car built by Arcwright Car, side view Dresser built by Arcwright Door built by Arcwright

Be first in line.

Founding creators get early access to the editor and a say in what gets built next.