Godot is a powerful cross-platform game engine
Real Time Strategy game engine supporting early Westwood classics
Fast and lightweight JavaScript game engine built on WebGL and glTF
3D game engine/framework in C, with Luajit and Python bindings now
A game framework written with osu! in mind.
Open source library for creative expression on the web, desktop, etc.
Cross-platform game engine in Rust
Old-school 2D game engine
A Complete WebGPU Game Engine for Browser & Desktop Arcade Oriented
utility collection for 2D game development in Java; sound-player
Orx: Data-Driven Game Engine
Game engine supporting many 3D/2D formats and graphic effects
PyCAPGE - Python Classic Adventure Point and Click Game Engine
Vivid3D is an open-source 3D engine with powerful 2D UI.
MIT Licensed Open Source version of Torque3D from GarageGames
A high speed C++17 Vulkan game engine
Spring is a free RTS engine developed for Windows, Linux and Mac OS X.
2D Game Engine
A cross platform Lua based game engine
Cross-platform 2D and 3D game engine
Portable game engine with main focus on point-and-click adventures
Multiplayer game server based on Node.JS
A project to create a blazingly fast Swift game engine
scriptable game engine with built-in support for 2D graphics and sound