OpenMU - Showcase Project
Listed November 7, 2026
About OpenMU
Play classic MU Online in your browser or phone, with zero downloads
OpenMU is a free Season 6 MU Online server you play straight in the browser, on desktop and on phones, with no download. Create an account, click Play and you are in Lorencia in about a minute. The 2000s 3D MMORPG normally needs a 1 GB client and a Windows PC. Here a TypeScript + Babylon.js (WebGL) client talks to the open-source OpenMU server (C#/.NET) through a small WebSocket-to-TCP bridge written in Bun. Assets are converted to GLB, gzipped, bundled and cached by a Service Worker, and the client lowers its own quality when FPS drops. What players get: Season 6 Episode 3, 20x EXP, unlimited resets, all 7 classes, the classic events, a player-to-player market (zen or jewels, items held in escrow), a drop lookup, a public balance lab and a friends panel. New accounts get 5 days of VIP for free. Technical write-up: https://openmu.hashnode.dev/running-classic-mu-online-season-6-in-the-browser-and-on-mobile
Project details
Website: https://openmu.com.br/en
Video 1: https://youtu.be/dSK5jlz3b5s