Blocks Beyond the Stars -
a Free and Open-Source Space Game
Build your own spaceship, land on alien planets and explore a vast block-based universe – alone or with friends.
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Blocks Beyond the Stars is a 3D space crafting adventure for explorers and builders. You start with a small ship, find resources, expand your fleet, and discover alien worlds. Host your own server, play with friends, and uncover the secrets of the mysterious VEGA protocol.
You can download the game here.
One download – three ways to play. Explore the universe solo at your own pace, play together on your home network (LAN) with family and friends – or join a world online on our official servers. Everything is built right into the game: free, and no sign-up needed to start playing.
Version: v2026.9.13 (09/21/2026)
What's new? → Read it in the DevBlog
How you can play
🌍 Playable in 14 languages · 🎮 Keyboard & mouse, gamepad or touch · 💻 Windows, Linux, macOS — or right in your browser
After the download, every road is open to you – one and the same client can do it all:
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🧑🚀 Single player: Start your own world and explore the universe all by yourself – no internet connection and no account needed.
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🏠 LAN / home network: Host a world right on your PC and play together with family and friends on the same network.
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🌐 Online on our official servers: Create a free account and set up your own world. There are no open public servers – every world belongs to a player. To play with friends: first set a password, then list your world publicly (in the world's Manage dialog → "List publicly"; only password-protected worlds can be listed). Your friends find it under Official Worlds → Public worlds and join with the password. This is by design. Still beta – download a backup of your world regularly.
Note for the first start on Windows
The current Windows version of Blocks Beyond the Stars is not yet digitally signed. Windows may therefore show a SmartScreen warning on first launch. If you downloaded the game from here or from the official GitHub and trust the source, you can start it via "More info" and then "Run anyway".
Note on the Windows Firewall
Blocks Beyond the Stars uses a client/server architecture internally. On first launch the Windows Firewall may therefore ask for network access. Recommendation: allow access for private networks only, unless you know for sure that you need public network access.
Early development version
Blocks Beyond the Stars is a free family game project under active development. Bugs, missing content and compatibility issues are possible – feedback helps us a lot (just press F1 in the game). The game updates itself and shows you "What's new?" right in the game after every update.
For techies 🛠️
Want to run your own always-on server – at home or on a root server? On GitHub you'll find the Docker image for the game server and a self-hosting guide.
We appreciate every bit of support on GitHub!
What is Blocks Beyond the Stars?
Blocks Beyond the Stars combines space exploration, crafting, base building and multiplayer. You start with your own spaceship and can use any procedurally generated world as your playground. Land on planets, gather resources, build new modules, research blueprints and turn your ship into a true home in space. Each planet offers unique biomes, creatures and materials – you decide where the journey goes and which goals you pursue.
Multiplayer & Self-Hosting
Blocks Beyond the Stars is designed from the ground up as a multiplayer experience. Play in a private universe or host your own persistent world. Your friends can join at any time, share resources, build bases and construct space stations. You can even talk to each other: text chat and voice chat (push-to-talk) are built in, alliances share bases and stations, and players trade directly with one another.
Story teaser / VEGA Protocol
An AI named VEGA accompanies you. It helps you, but many questions remain open. Ancient DataQubes and ruins tell of lost pioneers and a fallen star network. Follow the clues – or leave them be.
Spaceships, Bases & Planets
Your spaceship is more than a vehicle – it is your mobile base. You build it yourself: lay the keel, raise the hull, commission it at the helm. You extend it with new rooms, technology, cargo bays and specialised modules. On planets you found bases, in orbit you build space stations. In multiplayer these structures grow through teamwork.
Planets are not just a backdrop, but places to explore, build and mine. Biomes, rare resources and unexpected creatures make every landing unique.
What's inside
🪐 A whole star system — and more beyond it. Procedurally generated star systems with a sun, planets, moons and asteroid belts. 21 planet types from lava worlds to floating skylands, each with its own terrain, plants, animals and weather. The worlds are round: walk all the way around.
🌦️ Weather that matters. Storms drift across the land, fog settles in the valleys, acid rain falls on toxic worlds, meteor showers come down on the moons. A roof is a real answer — and sometimes walking into the storm pays off.
🧱 Build beyond cubes. Reshape any block into slabs, ramps, domes, furniture — or draw your own forms — dye it any colour and paint your own textures on it. Share whole builds with friends as a code. All inside the game.
🚀 Ships, stations, bases. Lay a keel, build your ship block by block and commission it at the helm — it flies the way you built it. Found bases with life support and airtight rooms, put space stations into orbit, repair and claim wrecks.
⚒️ Mine, research, craft. Dig ore, smelt it, research blueprints — from the hover speeder to the space station. Factories produce in bulk, greenhouses grow food, achievements reward you along the way.
🧑🤝🧑 People who remember you. Traders and settlers get to know you by name, conversations have choices, friends call you on the radio, settlers move into your base. Missions, bounties and build jobs wait on the boards; bandits can be paid off — or fought.
🐾 Tame creatures, find mysteries. Turn wild animals into companions. Discover ruins, treasure chests, monuments with glowing runes and a few places that exist only once in every galaxy.
📖 The VEGA Protocol. An optional story campaign narrated by your ship's AI — with an intro cinematic, lore fragments, Guardian machines, a two-route finale and a real ending. Plus an in-game Codex and DataQube mini-games.
👨👩👧 Made for families. No blood, no glorified violence. Name screening, mute, report and a voice-chat switch for the host — plus peaceful family presets for your world.
Beyond the Stars
Blocks Beyond the Stars is a family project. Justus develops ideas for planets, creatures, and game mechanics, Marcel takes care of the technology and implementation, and Verena supports the project with testing and balancing.
How a ten-year-old child's idea became a real open-source space game is told in our DevBlog as well as in a book and audiobook about the game's creation.
We also use AI tools as aids in the implementation. The ideas, the creative direction, and the decisions come from us.
Get Involved!
Blocks Beyond the Stars grows and evolves together with its players.
Try the game, send us your feedback directly by pressing F1, share your own ideas, or vote on what we should develop next. Developers, translators, creatives, and curious playtesters are very welcome too.
Let’s make the game great together!
Student Club –
KuBa West Trier
Develop your own missions and worlds, design ships and buildings, test new game versions and work creatively with AI tools.
The club is open to students of all grades. No programming skills required.
You'll find current dates, rooms and the registration form on the club page.