Etro Project is a MU Online Season 3 Classic server that brings the game’s classic spirit to a modern foundation. The project prioritizes gameplay, stability, and security, with Windows and Android players sharing the same world. Its available clients include a Windows version using OpenGL, a Windows version powered by the SDL3 graphics engine, a native Android app, and an Android client optimized for tablets. Players can download clients directly from Etro Project’s own host and create an account to get started.

The site provides introductory guides to the testing phase, covering useful shortcuts, the Jewel Bank, starting features, equipment, and early progression. It also introduces systems such as the Quest Panel, challenges, dungeons, and testing tools. Gameplay videos are available for the different clients, while the Etro Assistant offers game-related information and help to authenticated players. Etro Project combines classic Season 3 gameplay with evolving client options and practical resources for players exploring its shared game world.