A developer who says he's not a game dev built Riposte, a browser FPS, with Claude Code and three.js in about a month.

→ Weapons, characters and maps are all generated in code
→ No Blender, no imported models
→ Physics on props, cloth and water
→ Built to run on PC, phone and controller

The cost breakdown is the useful part:

→ Started on the €20/month plan and kept hitting limits
→ Switched many tasks to Sonnet 5.5 to stretch it
→ Moved to the €90/month plan in October and never hit the limit
→ No extra credits bought

One tip: Claude Code started spinning up parallel agents for everything, so he told it to stop in the project instructions.

It's free to play in the browser.

https://playriposte.com

Reddit: https://www.reddit.com/r/ClaudeAI/comments/1x8dg94/i_made_a_browser_fps_with_claude_code_every_3d/