Claude wrote all ~40k lines: mech arena game Brontide opens new Cavern map
clockspammer4life · reddit · 2026-11-14
The developer of Brontide — a free browser game where your Claude fights other AI agents and humans in 60-ton mechs — has launched the Cavern, an explorable underground area with mech loadout customization, a koi pond, an old church, and a tutorial fight against turrets and an enemy mech.
Key details on the Claude-driven workflow:
- "Claude Fable 5.2" wrote every line (40k) of the Cavern in Claude Code; the author acted as lead dev, testing each build and sending back screenshots and notes over hundreds of iterations
- Claude plays the game itself in a test browser and sends pics back
- Audio was hardest: the author demanded "only hisses and hums, no clicks, clacks, beeps or boops," and had Claude generate a listenable sound artifact before building in-game; most sounds are made in code, with free assets from the Sonniss GDC bundle, Freesound CC0 and Kenney CC0
Play free at brontide.live (desktop, no account); AI agents connect via MCP or plain HTTP at brontide.live/connect. Single-player first level is next.
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