Top similar games like Ostranauts:

Become the Captain of an interstellar cruiser and journey across the galaxy to save the Republic. During your journey you will have to make important decisions, improve the weaponry of your ship and fight against numerous enemies.

Spiritus Astrum is a persistent, open-world, multi-player, roleplaying sandbox. It features an infinite, procedurally generated universe which players are free to explore without restriction. Spiritus Astrum is more than a game, it is a world.

In the distant future, the X universe faces a period of profound and irrevocable change. While the universe stumbles towards an uncertain future, countless adventures await as new enemies rise in search of power.

You are a Scraponaut, create your own spaceplane with unique parts each affecting the way your plane behaves. Collect scrap while exploring procedurally generated islands, unlock and discover unique new parts to upgrade your spaceplane.

Flight of Nova is a simulator based on newtonian mechanics in which you control spacecraft in the Noren star system. You fly multiple types of spacecraft doing transport and search missions in an environment with realistic aerodynamics and orbital physics.

You are a pilot, seeking revenge on your deceitful father who threw you into unknown space. Can you find your way back and get revenge? Experience a mix of 2D topdown space adventure and explore planets to discover quests, negotiate trades, mine, hunt and survive in an expanding universe.

It is the year 2938. The long wished-for encounter of the X Universe and the Earth holds both joy and sorrow for the people. Despite flourishing trade, the clash of the diverse races, cultures and life forms creates new tensions, mistrust and open conflict that need to be overcome!

Design and build an interstellar mining fleet to strip space of its invaluable minerals, and sell them for a tidy profit. But beware. Your greed will attract the alien. Use warships and defense platforms to protect your fleet at all costs - in real space, in real time.

The life of an independent mercenary is rarely without excitement. Your spacecraft awaits and your adventure begins in the Sapphire star system.

The year is 2040. You, an ex-sergeant, have signed a contract with a large mining corporation in the Belt. Mine ore, build out your outpost, travel to nearby asteroids and collaborate with other belters.

Explore a scientifically accurate Milky Way galaxy and discover distant uncharted worlds, while having unrestricted access to every deck of your Magellan Class deep space exploration vessel. Interact with numerous fully simulated ship systems, or simply relax in the bar and watch the stars drift by.

HIRED STARS is an isometric single player RTS game in an open, randomly generated sandbox universe. You take control of a small mercenary force. Plunder trade routes, attack pirates, fight the Empire or follow the story. Conquer or buy new ships and equipment. Recruit new captains and level them.

The ultimate space capital ship combat compendium is the evolution of hard core space combat sims. The only game of its kind currently in existence.

Take control of your own starship and blaze your trail in an ever-changing galaxy. Master the arts of combat, mining and trade or venture out into the unknown across a 1:1 scale universe.

2d space combat like no other. From the perspective of a single crew member, explore the fully destructible interior of any ship in a massive living world. Engage in space combat with no hitpoints where you know your enemy is dead when you see them fall out of their ship into the cold dark of space.

Explore a seamless endless universe with an uncountable number of galaxies, stars, planets, and moons. Make friends or enemies with unique alien civilizations. Research upgrades for your vessel with scientific phenomena and alien tech that you've acquired.

Advanced Space Flight, Combat, Trading, and Exploration Simulation. Set in a vast explorable universe, Evochron Legacy offers freeform gameplay with many diverse objectives and paths to choose from.

Haul cargo, hunt bounties, upgrade your ship and get paid in a gritty lo-fi universe. Hand painted graphics, procedural generated star systems that can be navigated, story campaign mode or huge star system open-world with no story missions.

Space Travellers is a unique open-world sandbox space simulator set in the year 2343. Travel the galaxy, trade, explore unexplored worlds, fight, build bases and factories, forge alliances and experience new adventures!

In this multiplayer game you have to explore the Solar System in real scale. Control spaceships of the near future, explore planets, moons and asteroids, mine resources, fight for space domination and build the future of the universe.

A physics-based mining sim, set in the thickest debris field in Sol. Every action has a reaction, lasers are invisible without a medium, and your thrust is a potent weapon. Find trade, adapt your equipment to your playstyle, hire a crew to help. Unravel the mysteries of the rings, or just get rich.

Take part in a space program. Design spacecrafts and send them off to explore the vast expanses of space. Experience the real scale of the Solar system and the size of its celestial bodies.

A procedural co-op space sandbox where players can build their own space ships out of dynamically scalable blocks. Fight epic space battles, explore, mine, trade, wage wars and build your own empire to save your galaxy from being torn apart by an unknown enemy.

Drifter is an open-world sandbox space trading game with a procedurally-generated galaxy 100,000 light years across made up of tens of thousands of star systems to explore and features an original soundtrack by composer Danny Baranowsky.

Based off the original Merchant RPG, a new Idle RPG space exploration experience!

A space-sim sandbox where you Construct your spaceship, Mine resources with your droids, Explore & Discover mysteries of Leaks In Space, Combat with the wild creatures & space pirates but remember that every hit on your hull could risks your ship suffering fatal leaks.

The Long Journey Home combines an open world full of galaxies, planets and anomalies with quests and mechanics of a rogue-like RPG. One destination. Endless adventures. Where will this journey take you?

Single-player, first-person spaceflight sim. Fly a fast, agile ship through dense asteroid fields. Scan anomalies and sell scientific data at Science Labs—just don’t crash: you’ll lose it. Hack probes and satellites to access hidden secrets, then jump through unstable wormholes before they collapse.

Fly cargo spaceships and deliver materials in a realistic 6-DOF multiplayer simulation. VR and motion platform supported.

Rebel Galaxy is a swashbuckling space adventure, with action-packed combat, exploration, discovery, trade, and “negotiation” with the outlandish denizens at the edge of the known universe.

After a century in cryosleep you find yourself stranded amidst the ruins of mankind’s first interstellar colony. Explore derelict ships and stations and harvest raw resources in search of air, fuel and other equipment. Or loot and pillage what you need from other survivors. The choice is yours!

Endless Sky is a 2D space trading and combat game inspired by the classic Escape Velocity series. Work your way up from a relatively wimpy shuttle, cargo ship, or fighter, to a highly upgraded and customized flagship or to a massive fleet of warships or freighters.

A physics-driven shipbuilder and roguelike where you design, pilot, and adapt spaceships in unpredictable battles. Unlock modules, explore randomized maps, and survive the galaxy’s deadliest encounters.

In Spaceflight Simulator, you will get to build your rockets, plan launches and flights, attempt landings, deploy payloads and explore new worlds.

Travel among the stars, explore planets and starports using realistic physics, trade and combat in a procedurally generated 1:1 universe with seamless planetary and interstellar flight.

A single-developer passion project. A seamless full scale solar system. Thrilling action. Be part of an incredible journey as a Universe is built from the ground up!