Miu2D: 2D ARPG Engine from Scratch | Generated by AI
Miu2D is a from-scratch 2D ARPG engine written in TypeScript + Rust, rendering through raw WebGL with zero game-framework dependencies.
Key facts:
- 176,000 lines of code
- TypeScript + Rust (pathfinding compiled to WASM)
- Raw WebGL — no PixiJS, Phaser, Unity, Godot
- Custom sprite batching, A* pathfinding, binary format decoders, scripting VM, weather particles, screen effects — all from first principles
- Custom DSL with 218 commands + Lua 5.4 runtime (via wasmoon)
- Rust A* pathfinding runs in ~0.2ms via WASM with zero-copy shared memory
- SpriteBatcher coalesces ~4,800 tile draws into 1-5 WebGL draw calls
As a proof of concept, it rebuilds three classic Kingsoft (西山居) wuxia RPGs, fully playable in-browser:
- Legend of Yue Ying (剑侠情缘外传：月影传说) — 2001, 7+ endings
- Swords of Legends 2 (剑侠情缘贰) — 1998, Diablo-style real-time combat
- New Swords of Legends (新剑侠情缘) — 2001, 110+ maps
It’s a monorepo (pnpm workspace) with a web package, scripts for data conversion/analysis, and a Vercel deployment. The project is built with AI-assisted coding from day one (“vibe coding”).
Live demo at https://miu2d.com