The ioquake3 community effort to continue supporting/developing id's Quake III Arena

UPBGE, the best integrated game engine in Blender

Lina Engine is an open-source , modular, tiny and fast C++ game engine, aimed to develop 3D desktop games.

Awesome list of resources for Game Engine Development.

Archived repository. For current repo, see: https://github.com/etlegacy/etlegacy

High Performance Game Engine for Production Pipeline

FMOD Studio middleware integration and scripting API bindings for the Godot game engine.

Game Engine Development Series - Learn to code a Game Engine in C++ from scratch

Personal repo for learning the vulkan graphics api

2D RPG Game creator

Android Memory Access at Runtime: Reading and Writing Using Memory Files and Maps

Lightweight Sandbox Game Engine using OpenGL for additional Customisation and Quick Prototyping

Open source recreation of original Sonic The Hedgehog 1991 game on C++ programming language.

📚 Java Game Engine for text-based games.

Code accompanying the Medium article "Dependency Injection for Games"

Prototyping turn based card game

TypeScript based 3D game engine.

Lucent Engine – 2D and 3D game engine

Initial steps into game engine development

Java Raycasting Game Engine