GemRB is a portable open-source implementation of the Infinity Engine
This is a re-implementation of the 1995 PSX game wipEout
A modular Common Lisp game engine
Powerful, mature open-source cross-platform game engine for Python
Universal Unreal Engine VR Mod (4.8 - 5.4)
YimMenu, a GTA V menu protecting against a wide ranges
Zero Hour running natively on macOS, iPhone & iPad
fheroes2 is a recreation of Heroes of Might and Magic II game engine
Voxel game-creation platform with easy modding and game creation
Cross-platform 2D game engine focused on ultimate productivity
A simple Minecraft written in Rust with the Piston game engine
s&box is a modern game engine, built on Valve's Source 2
Action RPG that's easy to mod
The game engine for everyone
Real Time Strategy game engine supporting early Westwood classics
Voxel game engine in C++ with OpenGL
Write your game with TypeScript in UE or Unity
A completely free, open-source, 2D game engine
New Godot bindings for Swift
A rhythm game made with HaxeFlixel
A dead simple 2D game engine for Go
Descent 3 by Outrage Entertainment
3D Game engine with editor
A refreshingly simple data-driven game engine built in Rust
The Ren'Py Visual Novel Engine