A basic 3D environment with a first-person POV
Godot is a fully featured, open source, MIT licensed, game engine.
IGS Labs
A conservative source port of Wolfenstein 3-D
Pycraft is an open-source, OpenGL based game made in Python
A fork of Chocolate Doom with small Quality of Life enhancements
online 4X browser game engine
Advanced 2D/3D(CPU,GPU) Game Engine Library
Java Client + JS/Canvas Server-Side System, with maintained Objects
Amateur 3D Game Engine
Java Game Engine Project
"Abysmal Depths" is a simple C++-based text adventure game engine.
A retro style video game engine for RPGs and adventure games.
Android OpenGL Game Engine
Android port of Hulixerian game engine.
Multi-threaded game engine for Android
Animation Compression Library
Simple and scalable 3d javascript game engine
A 2D Adventure Game & Engine