Cocos simplifies game creation and distribution with Cocos Creator
Open 3D Engine (O3DE) is an Apache 2.0-licensed multi-platform 3D
Cross-platform 2D and 3D game engine with modular architecture
Free game engine for development of desktop, mobile, and web games
Command & Conquer: Remastered Collection
3D Game engine with editor
3D game engine with lua scripting
Doom-based AI research platform for reinforcement learning
Vivid3D is a C++ IDE/3D engine, with python scripting.
0 A.D. is a free, open-source, cross-platform real-time strategy game.
Simple 3d Top-Down Shooter & Free 3d Board Game
A fast-paced free software rally racing game
Attention! This tiny board/shooter game just created for fun
Parabator 3 - Rush of the Wind 1.4.3 (Xtreme3D Engine) Free board game
A free 3D game engine to create games and realtimes scenes for Windows
MIT Licensed Open Source version of Torque3D from GarageGames
3D C++ Game Engine - yet another open source game engine
2D Game Engine
Open RealStrategyGameLibrary (Engine)
A 2D game engine and level editor
2D Game Engine with Lua Scripting made on top of SFML
2D ARPG Engine
Clone of Urban Assault with new Graphics.