GitHub - moongate-community/moongate: Moongate is modern Ultima Online server built from scratch in C# with AOT compilation for high performance and nostalgic gameplay experience.

Moongate is a modern Ultima Online server emulator built from scratch in C# with AOT compilation, featuring a deterministic game loop, source-generated packet handling, snapshot+journal persistence, Lua scripting, and an HTTP API with admin/player portals. The author built it as a learning project to explore real architectural challenges in game server development rather than to replace existing mature emulators like ModernUO or POL.