Alternatives to Luanti

Online multiplayer game platform

2D and 3D game engine

Open-source, cross-platform game engine designed to be used by everyone

3D creation suite

Open-source engine for Heroes of Might & Magic III

Real-time strategy game engine for Westwood games

Frontend for emulators, game engines and media players (OpenGL graphics API)

C# scripting capable version of Godot game engine

Open-source transport simulation game

Lua-based game engine

Adds an OpenGL renderer to the ZDoom source port

Platform for 3D content