Browse free open source Game Engines and projects below. Use the toggles on the left to filter open source Game Engines by OS, license, language, programming language, and project status.
Every creative journey starts with Unity Hub
A modern, cross-platform Quake game engine based on FitzQuake.
Godot is a powerful cross-platform game engine
Open source reimplementation of GTA San Andreas game engine in Unity
KorGE Game Engine. Multiplatform Kotlin Game Engine & Korlibs
Magic Another Game Engine
GemRB is a portable open-source implementation of the Infinity Engine
Injectable LUA scripting system, SDK generator, live property editor
fheroes2 is a recreation of Heroes of Might and Magic II game engine
Multi Theft Auto is a game engine
Fast and lightweight JavaScript game engine built on WebGL and glTF
DOOM / Heretic / Hexen source port with enhanced graphics and UI
Open source voxel game engine with support for survival and crafting
Ct.js is a desktop game engine that makes learning programming fun
Spring is a free RTS engine developed for Windows, Linux and Mac OS X.
Open Source real-time strategy game engine for early Westwood games
Paintown is a 2d fighting game engine.
Real Time Strategy game engine supporting early Westwood classics
3D playground built on three.js and cannon.js
A Flutter based game engine
Open source clone of the Age of Empires II engine