World of ClaudeCraft: an open-source browser MMO being built with Claude
World of ClaudeCraft is a free, open-source, browser-playable classic-era MMO that’s being built and expanded with help from Claude.
It’s playable now in the browser and includes questing, classes, talents, dungeons, delves, PvP, trading, parties, persistent characters, and self-hosting. The project is MIT open source, and there’s a large Discord community using Claude to help build it further: adding systems, balancing classes, improving quests, debugging, writing docs, testing features, and experimenting with AI-assisted game development in public.
A few highlights:
- Free to play in the browser
- MIT open source
- Nine playable classes with talent specs
- Level 1-20 open world questing
- Instanced dungeons, delves, PvP arena, trading, parties, whispers, loot, vendors, and bags
- Procedural towns, creatures, spell icons, sounds, weather, and lighting
- Authoritative multiplayer server with persistent characters
- Optional self-hosting with Docker
- Headless Gymnasium-style environment for training AI agents on the real game core
- Optional Solana cosmetic badge, not required to play
The interesting part is how Claude is being used as a development partner across the project, not just for small code snippets. People in the community are using it to prototype features, reason through game systems, generate patches, fix bugs, expand content, and generally push the game forward as an open-source project.
Play: https://worldofclaudecraft.com/
GitHub: https://github.com/levy-street/world-of-claudecraft
Discord: https://discord.gg/GjhnUsBtw
Seems like a neat example of what community-driven, AI-assisted game development can look like.
