Open Source Games

Open-source game library manager unifying PC and emulated titles from platforms including Steam, GOG, and Origin with customizable plugins and themes.

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

Free, open-source real-time strategy game featuring ancient warfare from 500 B.C. to 500 A.D., with city building, custom maps, and cross-platform support.

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.

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.

SuperTux is an open-source 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.

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.

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! .

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.

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.

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

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

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...

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

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.

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...

The webgame preservation project.

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

Lightweight unofficial client enabling Steam, Epic, and GOG Windows games to run on Android devices, with cloud save support, direct installs, and APK downloads.

"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.

OpenMW is an free and open-source game engine recreation that reimplements the one powering Bethesda Softworks' 2002 open-world role-playing game The Elder Scrolls III: Morrowind.

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