The flexible game engine
Free game engine for development of desktop, mobile, and web games
Flax Engine, multi-platform 3D game engine
Cross-platform 2D and 3D game engine with modular architecture
Descent 3 by Outrage Entertainment
Recreation of the classic Grand Theft Auto III game executable
A completely free, open-source, 2D game engine
Open 3D Engine (O3DE) is an Apache 2.0-licensed multi-platform 3D
A fresh & lightweight javascript game engine
A game engine with an emphasis on real-time cutting-edge solutions
Go bindings for raylib, a simple and easy-to-use library
Portable version of the incredible Godot Game Engine
MIT Licensed Open Source version of Torque3D from GarageGames
Amazon Lumberyard is a free AAA game engine
Web powered cross-platform 3D, WebXR game engine
The Atomic Game Engine is a multi-platform 2D and 3D engine
Open-source, cross-platform, C++ game engine for creating 2D/3D games
An advanced flexible game engine for Java.