Arcwright Beta 1 is out. Describe a game and watch Claude Opus 5.5 build it in front of you. 2D or 3D. Free on Mac today, with Windows and Linux rolling out, or try it right in your browser, even on your phone. The first 100 accounts get 200 free Sparks to build with Opus 5.5. arcwrightengine.net #gamedev #indiedev

Every part laid out on the mat as it comes off is so satisfying. Getting down to the board with the RAM sticks sitting next to it feels like a real teardown.

A carousel, a clown funhouse and a blue anamorphic streak through the moon, live on a Steam Deck. Our Halloween park through the cinematic pack we ported to Vulkan today. The white specks are dirt on the lens, not snow. Built with Claude Opus 5.5 · arcwrightengine.net/download…

Inside the lens room of our lighthouse, live in a web browser. The game set itself to Max graphics, supersampled: Auto measures your graphics card and climbs as high as it can hold. Engine sound, light through the haze, the sea outside the glass. No download. Made with Claude Opus 5.5. Play: arcwrightengine.net/play/3d/…

Mirrors that reflect mirrors. This is the hall of mirrors in our funhouse, running live on a Steam Deck under Windows with our Vulkan renderer, about 48 fps. Each room is captured, so a mirror shows the room and the mirrors inside it, three reflections deep. Second picture: the same mirrors with captures off. Built with Claude Opus 5.5: arcwrightengine.net/download…

Ask for moodier lighting, a coin trail or a whole platformer level, and Claude Opus 5.5 edits the game for real, right in your browser: scene, tiles, sprites, lights and scripts. Every change can be undone. The first 100 free accounts get 200 Sparks to build with, and 96 are still open: arcwrightengine.net/account/

If Claude Opus 5.5 could build any game with you in Arcwright, what would you make first? Free engine: arcwrightengine.net/download…

Watching an AI build a room is strangely calming. This is the grand hall of our Ashgrove mansion going up inside Arcwright, built by Claude Opus 5.5 in the open editor. A status card says what it's working on, the camera follows the work, and you can stop or undo any step, or take over and build by hand. Free engine: arcwrightengine.net/download…

Title cards that bleed, buzz and glitch. Each one is a single line of script in Arcwright: blood that drips, neon that buzzes on letter by letter, words that glitch like a dying tape, and a death card that slams in. Nano Banana Pro drew the letters, and the engine traced them into real fonts. Made with Claude Opus 5.5. Free engine: arcwrightengine.net/download…

The question we get most: is Arcwright really free? Yes. The full engine is a free download for Windows, Mac and Linux. The Arcade, the browser editor and the 3D model Forge are free in your browser. Bring your own AI app or key and it costs nothing on our side, or build with the built-in Claude Opus 5.5 on Sparks. What you make is yours. arcwrightengine.net/faq/

Hiding the parents at scale 0 so only the fire lines and the slash streak show is such a clean trick

The little hand wave turning down the tomato at 220/220 is so cute

A whole navy futon dropping onto a 0.9 m pile is such a mean twist 😂

Put your headphones on for this one. Our engine now mixes 3D sound for headphones from every angle. The breathing circles your head, passes over you and under you, then stops right at your shoulder. The dot shows the sound's real path in the engine. For the scary game we're building with Claude Opus 5.5. Free engine: arcwrightengine.net/download…

This week's Arcwright challenge: one room, one minute. Make a game that takes place in a single room and can be beaten in about a minute. Build it free in the browser editor, with Claude Opus 5.5 helping if you like, then share it in #daily-challenge on our Discord. discord.gg/JDC2CwY9VN

Game devs: what's the most tedious part of making a game for you? We're building Arcwright so Claude Opus 5.5 can take that part off your hands, inside a real engine, for free. Reply with yours and we'll show you how it handles it. arcwrightengine.net/download…

Every game we're making in Arcwright is playable in your browser. All 11 of them. Neon Alley, Ironbell Keep, Ember Hollow, Post Street and more. Press Play, or open any of them in the editor and change the level, the art or the scripts. No download. Built with Claude Opus 5.5: arcwrightengine.net/editor/

334 free pixel-art pieces just landed in our browser editor. Heroes, bosses, enemies, props, tiles and backgrounds. Search for one, click it, drag it into your level, press Play. No download and no account needed. Free to use in your own games. The art was drawn with Nano Banana Pro and cut up by our own tools. The editor was built with Claude Opus 5.5. arcwrightengine.net/editor/

Look closer. There's a face in the static. AI draws the faces. Our engine's Signal FX buries them in old-TV snow and glitch tears. Then a neon sign buzzes on, letter by letter, in a font the engine traced from AI drawings. One line of script each. From the scary park game we're building for Halloween with Claude Opus 5.5. Free engine: arcwrightengine.net/download…

We made 12 real fonts in one morning. Nano Banana Pro drew every letter on specimen sheets. Then the Arcwright engine traced them into outlines and wrote real .ttf files: wet paint drips, claw marks, neon tube, pencil scrawl. It's called Type Forge, built into the engine with Claude Opus 5.5. Any project's AI can make its own fonts the same way. Free on Windows, Mac and Linux: arcwrightengine.net/download… #gamedev #typography

We build Arcwright in public. This page shows everything in progress, what's next and what just shipped, updated every day. Right now: a storm-watch lighthouse you can climb in your browser, and a moonlit house in the engine, all built with Claude Opus 5.5. arcwrightengine.net/now/ #gamedev #buildinpublic