A retro game engine for Python

FNA - Accuracy-focused XNA4 reimplementation for open platforms

PainterEngine is a application/game engine with software renderer,PainterEngine can be transplanted to any platform that supports C

Programmer-friendly framework for visual novels (VN) / text-based adventure games (AVG) on Unity

Defold is a completely free to use game engine for development of desktop, mobile and web games.

A lightweight game server framework implemented with Actor Model

Shattered Pixel Dungeon is an open-source traditional roguelike dungeon crawler with randomized levels and enemies, and hundreds of items to collect and use. It's based on the source code of Pixel …

LÖVE is an awesome 2D game framework for Lua.

The Ren'Py Visual Novel Engine

Real-Time Strategy game 3D engine coded in pure java

A powerful free cross-platform RTS game engine. - Report issues at https://springrts.com/mantis/

pyglet is a cross-platform windowing and multimedia library for Python, for developing games and other visually rich applications.

Moondust Project by Wohlstand

An emscripten port of onscripter-jh

A simple renderer implemented by WebGPU, includes a builtin path tracing pipeline.

Modern C++ high level GBA engine

Lua game framework for Gameboy Advance

PyMO AVG Game Engine implemention in C.

Godot Engine – Multi-platform 2D and 3D game engine

Cross-Platform C++ 2D/3D game engine

Open 3D Engine (O3DE) is an Apache 2.0-licensed multi-platform 3D engine that enables developers and content creators to build AAA games, cinema-quality 3D worlds, and high-fidelity simulations wit…

Game engine

XNA Port of Cocos2d-X

One framework for creating powerful cross-platform games.

high-performance rendering backend (C++, Python, C#, Java)

MIT Licensed Open Source version of Torque 2D game engine from GarageGames

A completely free, open-source, 2D game engine built on proven torque technology.

An experimental rendering engine