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.
Open source reimplementation of GTA San Andreas game engine in Unity
Godot is a powerful cross-platform game engine
Multi Theft Auto is a game engine
Fast and lightweight JavaScript game engine built on WebGL and glTF
A modern, cross-platform Quake game engine based on FitzQuake.
Magic Another Game Engine
fheroes2 is a recreation of Heroes of Might and Magic II game engine
An open-source, feature-packed alternative bootstrapper for Roblox.
The game engine for everyone
Real Time Strategy game engine supporting early Westwood classics
Powerful, mature open-source cross-platform game engine for Python
Solar2D Game Engine main repository (ex Corona SDK)
dhewm 3 main repository
Egret is a brand new open mobile game and application engine
Open source clone of the Age of Empires II engine
Open source voxel game engine with support for survival and crafting
A retro game engine for Python
DOOM / Heretic / Hexen source port with enhanced graphics and UI
3D playground built on three.js and cannon.js
2D physics engine for games
Improved version of the X-Ray Engine, the game engine
GemRB is a portable open-source implementation of the Infinity Engine
A Flutter based game engine