Free, open source game engine online
A retro game engine for Python
scene-oriented, flexible 3D engine (C++, Python, C#, Java)
Real Time Strategy game engine supporting early Westwood classics
RPG Maker 2000/2003 and EasyRPG games interpreter
A conservative source port of Wolfenstein 3-D
An authentic Rise of The Triad Dark War source port
A conservative source port of Heretic that is identical to DOS
A hand-crafted 2D game library in Go
Vivid is a modern C++ 3D engine using OpenGL4+
Planimeter Game Engine 2D - LÖVE-based game engine for Lua
A project to create a blazingly fast Swift game engine
The second demo of my game engine.
Gorgon Game Engine (GGE) is a C++ game engine that handles many tasks.
A retro style video game engine for RPGs and adventure games.
A DirectX based graphics/physics engine