Godot is a powerful cross-platform game engine
Open source voxel game engine with support for survival and crafting
One of the best Prodigy hacks
A complete 3-D game development suite written in Java
The Ren'Py Visual Novel Engine
Open game and rendering engine packed into a JavaScript framework
Open-source engine for Heroes of Might and Magic III
Xash3D FWGS engine
UCI chess engine
The open-source Roblox & UEFN alternative
An easy-to-use, working NitroType hack for typing at insane speeds!
fheroes2 is a recreation of Heroes of Might and Magic II game engine
Fast and lightweight JavaScript game engine built on WebGL and glTF
Voxel game engine in C++ with OpenGL
Flax Engine, multi-platform 3D game engine
Powerful, mature open-source cross-platform game engine for Python
Cross-Platform C++ 2D/3D game engine
JavaScript-based game engine designed to empower developers
A game engine powered by python and panda3d
Multi Theft Auto is a game engine
Build multiplayer web games played by millions
Multi-platform 2D and 3D game engine
Kitty-Tools is a Kahoot Cheating Client for all devices and interfaces
A refreshingly simple data-driven game engine built in Rust
Solar2D Game Engine main repository (ex Corona SDK)