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

rhythm is just a *click* away!

A list of awesome beginners-friendly projects.

Cataclysm - Dark Days Ahead. A turn-based survival game set in a post-apocalyptic world.

Flexible level editor

An open source re-implementation of RollerCoaster Tycoon 2 🎢

TrinityCore Open Source MMO Framework (master = 12.0.1.66263, 3.3.5 = 3.3.5a.12340, cata classic = 4.4.2.60895)

Mumble is an open-source, low-latency, high quality voice chat software.

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

rAthena is an open-source cross-platform MMORPG server.

2D game development library for Ruby and C++

fheroes2 is a recreation of Heroes of Might and Magic II game engine

A cross-platform virtual tabletop for multiplayer card games

Pencil2D is an easy, intuitive tool to make 2D hand-drawn animations. Pencil2D is open source and cross-platform. This project is developed by Chia-wen Chang

ossia score, an interactive sequencer for the intermedia arts

Open Source Computer Vision Library

A new, render-graph based 3D game engine for Linux and Windows using C++20 and Vulkan API 1.3 (in early development)

TripleA is a turn based strategy game and board game engine, similar to Axis & Allies or Risk.

Duelyst is a digital collectible card game and turn-based strategy hybrid, developed by Counterplay Games.

The world’s fastest framework for building websites.

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