Open Source Games

Video game library manager and launcher with support for 3rd party libraries like Steam, GOG, Origin and Uplay, providing one unified interface for your games.

Luanti is a near-infinite-world block sandbox game and a game engine, inspired by InfiniMiner, Minecraft, and the like.

0 A.D. is a free, open-source, cross-platform real-time strategy (RTS) game of ancient warfare. In short, it is a historically-based war/economy game that allows players to relive or rewrite the history of Western civilizations, focusing on the years between 500 B.C. and 500 A.D.

Lichess is the most complete chess experience, with a simple interface that focuses on the game, a massive array of game related tools and a huge, worldwide community.

SuperTuxKart is a free 3D kart racing game; we want to make the game fun more than we want to make it realistic. You can play with up to 4 friends on one PC, racing against each other or just try to beat the computer (a network multiplayer feature is planned).

Centralized game library management service, enabling clients to install games across platforms with web access, emulator profiles, and metadata support.

2048 is a popular sliding puzzle game written by 19 year old Italian designer Gabriele Chirulli based on 1024 which in turn was based on Threes! .

Veloren is a multiplayer voxel RPG written in Rust. It is inspired by games such as Cube World, Legend of Zelda: Breath of the Wild, Dwarf Fortress and Minecraft.

Xonotic is a free (GPL), fast-paced first-person multiplayer shooter that works on Windows, OS X and Linux. The project is geared towards providing addictive arena shooter gameplay which is all spawned and driven by the community itself.

osu! is a rhythm game based on the gameplay of a variety of popular commercial rhythm games. While aiming to keep authentic gameplay and scoring, osu! increases the epic factor through online rankings, multiplayer, replay exchange, and a huge community following.

SuperTux is a classic 2D jump'n run sidescroller game in a style similar to the original Super Mario games. Instead of Mario, the hero in this game is Tux, the mascot of the Linux kernel.

Ruffle is a Flash Player emulator written in Rust. Ruffle runs natively on all modern operating systems as a standalone application, and on all modern browsers through the use of WebAssembly. Leveraging the safety of the modern browser sandbox and the memory safety guarantees of...

An open-source clone of the classic game Transport Tycoon Deluxe. It attempts to mimic the original game as closely as possible while extending it with new features.

The Battle for Wesnoth is a turn-based tactical strategy game with a high fantasy theme.

A quick and easy to use drag and drop retro game creator for your favourite handheld video game system.

UnCiv offers a streamlined, gameplay-focused reimplementation of the hugely popular Civilization that's ad-free, open-source and built for speed. The game loads and plays very fast, offering a balanced design that lets players focus on...

Two genre defining games from completely different eras: Nintendo's Super Mario Bros. and Valve's Portal. These two games managed to give Platformers and First-Person Puzzle Games a solid place in the video game world.

ScummVM is a program which allows you to run certain classic graphical point-and-click adventure games, provided you already have their data files.

The webgame preservation project.

Freeciv is an open-source, turn-based strategy game based on Civilization II. Inspired by the history of human civilization, the game commences in prehistory and your mission is to lead your tribe from the stone age to the space age...

Create complex supply chains, produce materials, and defend against enemy waves in this cross-platform sandbox tower defense game.

Boardzilla is a place for playing and developing board games all within your browser. Boardzilla makes it easy to express the game rules and provides players with a simple interface to the choices available to them.

"Mental Math" is a simple and clean Android app for mental arithmetic training. You can practice on your own or challenge friends to compete and improve your skills. The app is open source and respects your privacy.

Track your progress, identify triggers, and celebrate milestones on your path to a healthier life.

Join "The Project" to restore humanity's synaptic-link technology after nuclear war has devastated Earth, rendering it a Warzone 2100.