This is a FLOSS voxel sandbox engine (formerly Minetest) for building and playing community games in cube worlds. Players explore, mine, craft, and host multiplayer servers; a large mod and game ecosystem ranges from survival worlds to education and creative builds.

NLnet/NGI funded two grants on this engine: EduLuanti (classroom tools) and MetaMorph (new modules, analytics, and interfaces).

Comparison

Luanti is often compared to Minecraft as a free, self-hostable alternative you can study and extend. It is lighter than many commercial voxel titles, runs on modest hardware, and keeps the engine separate from individual games and mods.

This is a FLOSS game from the Tycoon category where the player creates a working economic and industrial system. This game focuses on transportation of passengers, and the player is responsible for the creation of the transportation network and its maintenance.

Comparison

The game is inspired by Transport Tycoon Deluxe, contains all the features of the original game, and significantly extends them with additional elements. The original features were improved in terms of user experience and brand new options were added. The old-school graphics might be appealing to some players but also an obstacle to others.

This is a historical real-time strategy game focusing on the ancient era. Among other game features, the player can fight other civilisations, research new technologies or focus on economy. The developers focus on the historical accuracy of the buildings and units in this game.

Comparison

Players often praise the deep game features, nice background music, good artistic elements, and overall graphics. The players seem to enjoy this game as much as other commercial titles such as Age of Empires. The disadvantage of this project might be its slow development and possible bugs since the game is still a work in progress.

This first-person shooter game offers many gaming modes, such as deathmatch, capture the flag, team deathmatch, or tournament, similar to other existing commercial games.

Comparison

The game is inspired by Quake III Arena and offers generally the same features, as a FLOSS title.

This is a FLOSS two-dimensional platform game starring Tux, the Linux mascot. The player jumps across levels, collects coins, defeats enemies, and rescues Penny from the villain Nolok. Community-made worlds and a built-in level editor extend the base campaign.

Comparison

SuperTux is often described as a FLOSS alternative to classic side-scrolling platformers such as Super Mario Bros. The gameplay is simpler than modern commercial titles, but the project is lightweight, runs on modest hardware, and is easy to modify or redistribute.

This is a FLOSS three-dimensional kart racing game featuring mascots from the FLOSS world — Tux, GNU, KDE's Konqi, and others. It offers single-player cups, split-screen multiplayer, online races, and a story mode with varied tracks and power-ups.

Comparison

SuperTuxKart plays like a Mario Kart-style arcade racer, but with FLOSS characters and tracks instead of a commercial franchise. Graphics and polish have improved steadily across releases; it is a friendly entry point for casual racing on Linux and other platforms.

This is a FLOSS two-dimensional platform game in the Mario tradition. The player runs and jumps through levels, collects power-ups, and clears obstacles. A built-in level editor lets the community create and share custom worlds.

Comparison

Secret Maryo Chronicles plays closer to Super Mario World than to the original Super Mario Bros., and is often grouped with other FLOSS platformers such as SuperTux. Development on the original project has slowed, but the community continuation The Secret Chronicles of Dr. M. carries the idea forward.

This is a FLOSS three-dimensional real-time strategy game. The player commands The Project after a nuclear catastrophe, reclaiming territory, researching technologies, designing units, and fighting through a story-driven campaign. It also offers local skirmish against AI bots and online or LAN multiplayer with up to ten players.

Comparison

Warzone 2100 began as a commercial Pumpkin Studios / Eidos title in 1999 and was liberated under the GPL in 2004. Community development has replaced proprietary parts and extended the game with a deep tech tree, flexible unit design, and cross-platform multiplayer. It sits alongside other FLOSS RTS titles such as 0 A.D., with a post-apocalyptic setting and a stronger emphasis on designing and upgrading your own units.

This is a FLOSS voxel sandbox engine (formerly Minetest) for building and playing community games in cube worlds. Players explore, mine, craft, and host multiplayer servers; a large mod and game ecosystem ranges from survival worlds to education and creative builds.

Comparison

Luanti is often compared to Minecraft as a free, self-hostable alternative you can study and extend. It is lighter than many commercial voxel titles, runs on modest hardware, and keeps the engine separate from individual games and mods. EduLuanti (NGI-funded) builds teaching workflows on top of the same engine — Luanti itself remains an independent community project.

This is a FLOSS multiplayer voxel action-adventure RPG set in a procedurally generated fantasy world. Players explore landscapes, fight creatures, craft gear, and adventure with others on community servers. The project is written in Rust and developed in the open.

Comparison

Veloren aims at the feel of classic multiplayer sandbox RPGs such as Cube World or early voxel MMOs, without a commercial publisher. Graphics and world scale are among the more spectacular FLOSS game efforts; it is still evolving quickly, so expect rough edges alongside frequent visual and gameplay gains.