Arcwright

Moonglow Park closed in 1987. Somebody left the lights on. LAST RIDE OUT: the horror game we've been building in our own engine. Headphones on. Lights off. 🎡 Still in development, and every frame here is rendered live in Arcwright, built with Claude Opus 5.5. arcwrightengine.net/?utm_sou…

Two ways to cut AI sprites. We learned this one the hard way last night. On grey, the glow around a lantern looks like part of the art, so it gets cut out as a solid disc. On flat magenta (a colour nothing in the art uses), the cut is clean. That's how every piece in our free Halloween pack was made: arcwrightengine.net/editor/?… Engine built with Claude Opus 5.5.

Already pay for Claude Code, Codex or Cursor? Plug it into our game engine. It connects over MCP and builds right inside the editor while you watch: here it's placing theatre chairs row by row, each change labelled as it lands. You can stop or undo anything. The engine is free, and so is using your own AI with it: arcwrightengine.net/?utm_sou… Built with Claude Opus 5.5.

We made a whole Halloween pack for your next game. 🎃 66 pieces: a ghost, a zombie and a jack-o'-lantern that all animate, a Pumpkin King boss, graveyard props, paintable graveyard ground, candy pickups and a moonlit sky. Free in our browser game editor, free to use in your games: arcwrightengine.net/editor/?… Engine built with Claude Opus 5.5.

26 days ago, the first commit. This morning: 476,053 lines of Swift 7,776 commits One game engine built with Claude Opus 5.5, with its own renderer, physics, Forge for 3D models, a 2D editor that runs in your browser, and every one of these games. Play the 2D ones free in your browser: arcwrightengine.net/play/?ut…

Want your game to feel better in one minute? Play an effect on every hit. Explosions, slashes, sparks, lightning, smoke, magic. 29 animated effects, free in our browser game editor and free to use in your games. arcwrightengine.net/editor/?… Engine built with Claude Opus 5.5.

The trick to turning AI art into real game sprites: the background. 1. Ask for every pose on flat magenta. No character is that colour, so nothing gets eaten. 2. Our engine finds each pose and cuts it out, frames lined up on one scale. 3. It walks. This zombie is in our free Halloween pack: arcwrightengine.net/editor/?… Engine built with Claude Opus 5.5.

682 free pieces of game art, sitting in 8 packs inside our browser game editor. Heroes, enemies, bosses, tiles, backgrounds, effects and UI. Click one and it's in your level, already animated. Free to use in any game you make, even ones you sell. arcwrightengine.net/editor/?… Engine built with Claude Opus 5.5.

be honest, which brain are you? 🧠 The galaxy one is real: describe your game to the AI in our free browser editor and it builds it while you watch. arcwrightengine.net/editor/?… (engine made with Claude Opus 5.5)

Your game is yours. Arcwright is royalty-free until a game has earned $20 million. No cut of your first sale, your first thousand, or your first million. These four were all made in it, and you can play them free in your browser: arcwrightengine.net/play/?ut… Engine built with Claude Opus 5.5.