He plugged AI into D&D as the DM, and the kids are in charge of derailing the story

Meng To had always wanted to play D&D with his kids, but he lacked a dungeon master who was always online and could roll with the kids' bizarre decisions. So he built WYRFALL, a multiplayer, D&D-style turn-based RPG. On the left side of the interface are a dragon and the sky; on the right are login and preview entry points. The video is below.

The tech stack is no mystery. In replies to users, Meng To said it's all built with Three.js. Assets are mostly procedurally generated, character models use Tripo3D, and quite a few 2D images are being used as placeholders for now. Iterating on this with older models took a lot of time; Opus 5.5 made the process somewhat faster. The video was also made with Opus, and he mentioned that this helped him break out of solo project development.

The AI dungeon master is the core. One user asked whether it remembers maps and NPCs, or resets every time you start. Meng To said the context is very large, and you can also choose the AI model. Another user was concerned about pacing: when kids are playing a tabletop game, a good DM needs to know when to cut a scene short and hand the turn back to the players; models tend to keep talking. Meng To replied that smarter models handle it well, and you can ask the GM at any time.

Another user suggested adding a shared quest log so decisions like 'we adopted the goblin' persist across saves, rather than tracking progress only by the amount of treasure. Meng To said there are many possibilities. Someone asked about tutorials and open source; the reply only mentioned that he could keep writing, with no timeline.

Original tweet: https://x.com/MengTo/status/2115756268925448353