Go bindings for raylib, a simple and easy-to-use library
The Open Toolkit library is a fast, low-level C# wrapper for OpenGL
An OpenGL RTS game engine written in C
Game engine supporting many 3D/2D formats and graphic effects
Cross-platform game engine in Rust
GemRB is a portable open-source implementation of the Infinity Engine
Pycraft is an open-source, OpenGL based game made in Python
A modern, cross-platform Quake game engine based on FitzQuake.
Amateur 3D Game Engine
A tool to easily transform Unreal Engine games into VR experiences
A cell-based puzzle game featuring classic and completely new puzzles
PyCAPGE - Python Classic Adventure Point and Click Game Engine
Embeddable unity game engine view for Flutter
Free, open source game engine online
C++ lightweight cross-platform game engine
The multiplayer game engine
Vivid3D is an open-source 3D engine with powerful 2D UI.
MIT Licensed Open Source version of Torque3D from GarageGames
A game engine for console based text games
Vivid is a modern C++ 3D engine using OpenGL4+
Spring is a free RTS engine developed for Windows, Linux and Mac OS X.
Go 3D Game Engine
Cross-platform 3D scene editor based on three.js, golang and mongodb
DOOM / Heretic / Hexen source port with enhanced graphics and UI