Top similar games like Unending Galaxy:
Unending Galaxy $4.99
Unending Galaxy is a unique space-sim in which you can fill any role from pirate or trader to the leader of a large galactic empire.
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NaevFREE
Naev is a game about space exploration, trade and combat. Players travel the galaxy and earn money by trading, fighting and performing missions.

Celestial Front - Galactic War Sim$0.99
Watch as stars battle for control of a simple simulated galaxy. Each star belongs to a faction, indicated by its color, and combat happens automatically between neighboring stars. Your role is to observe the dynamic battlefield as stars change ownership.

Voidship: The Long Journey$10.99
Design your battleship and fight your way through unforgiving space. This is a tale of a lone spaceship on a centuries-long mission. As the captain, you´ll make strategic decisions, explore unknown sectors, meet allies and enemies, gather resources, technology and crew. To battle stations!

Interstellar Pilot 2$0.99
The hit mobile game Interstellar Pilot 2 has come to Steam. Join the TEF forces heading to the Gatopean sector to find a new home for mankind. Play how you like in this open world space-sim developed by Pixelfactor.

The Universim$29.99
Jump straight into managing your own planets as you guide a civilization through the ages. Build the ultimate empire in The Universim, a new breed of God Game in development by Crytivo.

Habitat$14.99
Habitat is a physics-based space game where you build, fly, and fight with whatever you can find out in space. Upgrade and arm your creations with weapons and structures you find in orbit, fly and explore using rocket physics.Battle deadly enemies in Campaign Mode to save humanity or explore Sandbox Mode for true creative control.

nStations$4.99
Construct and manage your colony anytime, anywhere, any device!!!!

Subdivision Infinity DX$14.99
Subdivision Infinity is an immersive and pulse pounding sci-fi space shooter featuring stunning graphics and tight spaceship game play. Hunt down and destroy enemy spacecraft, crush capital ships, mine asteroids for rare minerals, and find blueprints to craft amazing new vessels!

Aven Colony$29.99
Build a new home for humanity in Aven Colony. Discover Aven Prime - an alien planet of deserts, tundras, and wetlands light years from earth. Build your colonies into massive, sprawling cities whilst dealing with the challenges faced when settling on a new world.

Gaia Beyond$14.99
Gaia Beyond is a handcrafted 2D Action-RPG, an exploration mix built around the core features fighting, mining and trading. Your decisions are footprints within a vast non-linear solar system. Forge alliances among numerous factions and develop relations with hundreds of NPCs.

Pixel StarshipsFREE
Pixel Starships is an FTL-style online sci-fi strategy builder and management game with a competitive PVP tournament. Set in the retro galaxy, your role is to explore space, meet aliens, and develop your ship, crew and AI. The game contains deep strategic and 4x elements. PSS is community-driven.

Battlevoid: Sector Siege$9.99
Battlevoid: Sector Siege is an epic straight into action real-time space strategy game, in which the world has been built to deliver a lively battle field; and the action is never more than just seconds away at the start of every game.

Starcom: Unknown Space$24.99
Starcom: Unknown Space is an action RPG of space exploration and adventure. Build your own starship while discovering an epic story in a universe of strange mysteries, alien factions and uncharted worlds.

Starship EVO$19.99
Create the Starship of your dreams, explore the vast expanse of the galaxy, land on planets and jump into epic space battles. Experience a truly unique and powerful building engine where your imagination is the limit. Welcome to the next evolution in Space Sandbox gaming!

Droneboi: Conquest$8.99
Build, fly, and battle in Droneboi: Conquest - the ultimate space sandbox game! Explore Conquest, engage in combat, and upgrade your ship. Start your space journey today!

Evochron Mercenary$14.99
The life of an independent mercenary is rarely without excitement. Your spacecraft awaits and your adventure begins in the Sapphire star system.

Space Engineers$19.99
Space Engineers is a sandbox game about engineering, construction, exploration and survival in space and on planets. Players build space ships, space stations, planetary outposts of various sizes and uses, pilot ships and travel through space to explore planets and gather resources to survive.

Space Architect$9.99
Design your dream space station in Space Architect! Master the power of automation or 'hire' an army of crewmates to handle your ever-growing production. Mine asteroids, fabricate goods, and engage in interstellar trade to pay off the menacing Big Evil Corp. Will you thrive in the vastness of space?

Edge Of Galaxy$4.99
Edge of Galaxy is a real-time tactical space sim with RPG-lite elements. As the commander of a mercenary fleet, you must hire and manage your ships, upgrade their capabilities, and rise through the ranks to become a legend among mercs.

Space Pirates and Zombies$9.99
Explore a randomly generated Galaxy populated with factions, enemies, missions, and items providing you with a unique experience each time you play.

Astrox: Hostile Space Excavation$9.99
Exiled to a deep space mining sector, you are left with a crappy ship, a laser, and a small mining beam. It is up to you to survive by working your way through the galaxy. Mine asteroids, refine and trade the ore, buy upgrades for your ship, hunt pirates... you get it.

Stellar Tactics$19.99
A Sci-Fi role-playing game featuring turn-based ground combat, space exploration, deep character customization and a massive living universe with over 160,000 star systems. Equip your ships with the best equipment you can find, gather a powerful crew of mercenaries and set out into the void!

Cosmonautica$9.99
Cosmonautica is a fresh take on space trading in a procedurally generated universe, paired with quirky humor for your intergalactic enjoyment.

IstrolidFREE
In Istrolid you design your own unique spaceships from a large number of parts to fit your strategy and play style. With no set units or factions you are free to create a fleet where each ship has its own balanced strengths and weaknesses, from basic fighters and bombers to hulking battleships and speedy destroyers.

Star Horizon$9.99
Experience fast action, thrilling levels, spectacular explosions and lots of pew-pew-pew. Star Horizon is a reboot for the on-rails space shooter genre.

SAELIG$14.99
SÆLIG is a game that blends together elements of simulation, strategy, RPG, and business management. Centred around the life of you and your family, you must try to survive and bring wealth and prosperity to your household.

Spaceport Trading Company$14.99
Become spacefaring merchant in a galaxy filled with diverse planets, each with its own economy, resources, and challenges. Amass wealth and reputation by trading goods, negotiating with factions, and navigating the intricacies of interstellar commerce.

Between the Stars$29.99
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.

Crying Suns$24.99
Crying Suns is a tactical rogue-lite that puts you in the role of a space fleet commander as you explore a mysteriously fallen empire. In this story rich experience inspired by Dune and Foundation, each successful run will uncover the truth about the Empire... and yourself as well.

Star Conqueror 舰队指挥官$14.99
Engage in real-time battles with customizable space warships. Explore the galaxy, forge alliances, develop powerful ships, and defeat alien invaders.

Space Rogue$9.99
Take on the role of a spaceship captain. Explore new worlds, and engage in intense ship-to-ship battles. Develop unique battle tactics, upgrade your ship, and recruit crew members as you fight for peace or piracy.

Space Crew: Legendary Edition$24.99
Time for your toughest mission yet! Recruit and train your crew to tackle the growing threat from alien and android armies as you defend Earth to become a Galactic Legend in Space Crew: Legendary Edition. All new content free to existing owners of Space Crew!

Blueprint Tycoon$2.99
Build your settlement, gather goods, ensure maximum efficiency and make a profit!

SpaceEngine$29.99
The world's first science-based photorealistic interactive 3D planetarium that models the entire Universe, using procedural generation for uncharted areas.

MatchyGotchy Z$5.99
MatchyGotchy Z is a colorful digital pet game that combines idle clicker elements with a new take on pet-raising simulation: trainable personalities. All the nostalgia of those old virtual pets, fully adapted into a new desktop gaming experience.

Stellar Monarch$14.99
Asymmetric space empire builder where you feel like the Emperor, not a logistics officer. No micromanagement, grand scale, fast paced, audiences, assassins, imperial court, disloyal admirals.

Foundation$34.99
Foundation is a grid-less, laidback medieval city-building game with a focus on organic development, monument construction and resource management.

Universal Combat CE$9.99
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.

Keplerth$14.99
Welcome to Keplerth! Try to survive on a hostile alien planet in this 2D sandbox RPG, where you can choose to live alone or fight side by side with your friends in the online multiplayer mode. Survive, build, farm, fight, and explore your way to victory in this open-world adventure!

FortressCraft Evolved!$12.99
FortressCraft Evolved is a unique blend of Voxel Landscapes, Tower Defense, Crafting, Logistics, Exploration, Combat and Assembly lines. Players begin by crash-landing on a strange alien world, left with only a small handful of starting machines.

Deep Space Battle Simulator$9.99
Two teams of players control their capital ship in an epic battle. Customize your ship, control its movement, weapons, and energy distribution or go to one of the hangars to join the battle in a smaller fighter!

Helium RainFREE
Trade your wares and eliminate the competition in a cutthroat world. Buy new ships and stations to mine and haul resources. Explore the vast emptiness of space.

Galactic Civilizations® I: Ultimate Edition$4.99
Galactic Civilizations is a space based strategy game in which you are in control of humanity's destiny.

SpaceBourne$14.99
Spacebourne is an open space exploration game with Rpg elements. Its world consists of different factions at war. You as an expert pilot need to choose your side or be on no one's side and create a force of your own. Load up your weapons, Ready your ship and warp to adventure.

Objects in Space$24.99
Objects in Space is a retro space game centred on 2D point-and-click stealth action in a massive open world. Players have their own customisable ships and can meet people, become a trader, bounty hunter, explorer, scavenger or all of them at once.

Transport Fever 2$39.99
The classic transport simulation genre has a new gold standard with Transport Fever 2. Discover a whole new world by navigating transport routes through land, water and air. May progress and prosperity find their way!

Exo TD$19.99
Exo TD is a true 3D space Tower Defense. Invaders have scouted your planet as their next target, you must protect it by building destructive turrets, orbital defenses, shields, drones and more to defend against the incoming invasion force.

Void Destroyer$3.99
Combining the best of space combat and real time strategy. Victory can be tactical, a dogfight or capital ship slugging match - depending on how you decide to achieve it. Space combat on a RTS scale with space sim savagery.

Sipho$17.99
Sipho is an action survival game with an intricate building system. Grow your own creature and take over the local ecosystem. Fight, grow, survive, dominate. Play in adventure or sandbox mode.

Space Trash Scavenger$19.99
Grab your jetpack and explore procedural asteroid fields, derelict spaceships and abandoned outposts. Build and automate your Space Rig to process scavenged trash. Craft, trade and fight your way home in this interstellar, open-world survival sandbox.

Fairspace$8.99
Fairspace is an amateur developed open-ended space exploration, trading and combat game. A full and rich persistent universe awaits your discovery.