DOOM / Heretic / Hexen source port with enhanced graphics and UI
Data-oriented and data-driven game engine written in Rust
Java-based agent simulation platform
ZED OS the clone of Windows XP
A customizable 3D platform for agent-based AI research
A fast-paced free software rally racing game
3D Game engine with editor
3D playground built on three.js and cannon.js
Explore and dissect a complete brain model in VR
JPHP - an implementation of PHP on Java VM
Modern 3D engine and IDE written using C# and C++.
A 3D Snake and 2D snake
A fun realistic multiplayer free-and-open-source first-person-shooter!
A 2D game engine and level editor
A complete framework for Godot to create beautiful and complex AI
8-bit Graphical API for Java
IGS Labs
Cross-platform 2D and 3D game engine
Vivid Engine 2 is an open source 3D Engine coded using C# and C++.
Opensource Game Studio
Android OpenGL Game Engine