Open Source Games

The automation tower defense RTS

Desktop/Android/HTML5/iOS Java game development framework

Archived — A list of games, add-ons, maps, etc. hosted on GitHub. Any genre. Any platform. Any engine.

Open Source real-time strategy game engine for early Westwood games such as Command & Conquer: Red Alert written in C# using SDL and OpenGL. Runs on Windows, Linux, *BSD and Mac OS X.

An open source re-implementation of RollerCoaster Tycoon 2 🎢

Clone of the Age of Empires II engine 🚀

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

Open-source Android/Desktop remake of Civ V

An open source re-implementation of Diablo 2

Diablo build for modern operating systems

OpenTTD is an open source simulation game based upon Transport Tycoon Deluxe

A work-in-progress, open-source, multi-player city simulation game.

[mirror of https://gitlab.com/veloren/veloren] An open world, open source voxel RPG inspired by Dwarf Fortress and Cube World. This repository is a mirror. Please submit all PRs and issues on our GitLab page.

Space exploration, trading, and combat game.

An open source, turn-based strategy game with a high fantasy theme.

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 Dungeon, by Watabou.

Tower defense game that teaches cloud architecture. Build infrastructure, survive traffic, learn scaling.

Open-source engine for Heroes of Might and Magic III

Open source clone of Theme Hospital

Command the forces of The Project in a battle to rebuild the world after mankind has been nearly destroyed by nuclear missiles. A 100% free and open source real-time strategy game for Windows, macOS, Linux, BSD+

Official NetHack Git Repository

A multiplayer game about paranoia and chaos on a space station. Remake of the cult-classic Space Station 13.

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

An open source re-implementation of Caesar III

Widelands is a free, open source real-time strategy game with singleplayer campaigns and a multiplayer mode. The game was inspired by Settlers II™ (© Bluebyte) but has significantly more variety and depth to it.

Fallout for modern operating systems

Fallout 2 for modern operating systems

Open-source clone of the original X-Com 👽

A cross-platform minigolf game written in C.

A game of lonely space adventure

An open source re-implementation of Chris Sawyer's Locomotion

Tactical 2D shooter in fishy pixels style. Made with Rust-lang 🦀 and Bevy 🪶

The Turn Based Strategy Game/eSport. Master your beasts! 🐺

Multiplayer top-down shooter made from scratch in C++. Web version: https://play.hypersomnia.io Made in 🇵🇱

3D City Builder without a grid

A free and open-source Touhou Project fangame

Unknown Horizons official code repository

A free/open source client and automation tool for Ragnarok Online

Brogue: Community Edition - a community-lead fork of the much-loved minimalist roguelike game

An Open Source Pixelart Science-Fiction Real-Time-Strategy game

Source code repository of the FreeOrion project.

A modern re-implementation of the classic DOS game Duke Nukem II

Unknown Horizons Godot Engine Port

Open source RTS game running on the Spring/Recoil engine

DDraceNetwork, a free cooperative platformer game

A port of Micropolis to JS/HTML5

FreeCol: FreeCol is a turn-based strategy game based on the old game Colonization, and similar to Civilization. The objective of the game is to create an independent nation.

Base environment for Red Eclipse and associated source files.

OpenKO is an open source version of the old school Knight Online MMORPG. Specifically designed for version 1.298.

A new and modern engine for custom Tomb Raider levels incorporating classic features and new enhancements.