Ryzom Core is the open-source MMORPG framework built on the NeL engine, maintained by the Ryzom Core community. The commercial Ryzom game is developed by Ryzom Forge on a downstream fork at gitlab.com/ryzom
A free, open source 2D online RPG engine in C#/.NET
🌎 runescape classic private server mmorpg emulator
Sovereign 2.5D MMORPG Engine
It is what comes after gl2
Backend support for real-time Action Battle System (MMORPG Maker MZ)
Nightmare-317 is an open source free to play MMORPG!
A browser-first sci-fi RPG centered on skill grinds, crafting, and server-authoritative loops. Built with agentic coding harnesses (Claude Code, Codex, Hermes) under human architectural review. Pre-alpha.
DimensioneX Massive Mutiplayer Game Engine (MMORPG)
(WIP) 2D MMORPG built in C++ with Qt, featuring a shared game engine, dedicated client, world editor, and server. Designed to be highly configurable, allowing developers to create and customize tiles, objects, interactions, items, characters, and game worlds without modifying the core source code.
*Game Engine *WIP
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