Quetzal Engine — Play in Browser

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Quetzal Engine Unity + Node.js + MySQL

Architecture Overview

Quetzal Engine connects a Unity WebGL frontend to a persistent backend that tracks player state, inventory, and world events across sessions.

Frontend

Unity WebGL

C# game logic compiled to WebAssembly via IL2CPP
UnityWebRequest bridges game events to the REST API
Player state is serialized and synced on scene transitions

Backend

Node.js REST API

Express.js server with JWT authentication middleware
Route handlers for player sessions, inventory CRUD, and event logs
Stateless design — each request is fully self-contained

Persistence

MySQL Database

Relational schema: players, sessions, inventory, world_state
Foreign key constraints enforce referential integrity
Indexed on player_id + session_token for low-latency reads

Data Flow

Unity Client

→ HTTP/JSON →

Node.js API

→ SQL queries →

MySQL

Stack

Unity 2022 C# Node.js Express MySQL JWT WebAssembly