- #1 Star Conflict
97% matchMostly Positive73% of 15,084 reviews2013
Dev: Star Gem Inc.Pub: Gaijin Network Ltd
Windows · Mac · Linux
Median: 2.0 hrsMean: 34.3 hrs≥1hr: 63%
Star Conflict is an action-packed, massively multiplayer space simulation game that puts players in the role of elite pilots engaging in a widespread interplanetary skirmish. The whole world for PVP and PVE!
Why similar: Space Sim 28.5% ★, Flight 17.5%, Massively Multiplayer 11.5%, Aliens 10.9%, RPG 9.2%
- #2 The Infinite Black 2
96% matchVery Positive84% of 231 reviews2023
Dev: SpellbookPub: www.Spellbook.com
Windows
Command a fleet of ships to hunt aliens, trade resources and loot treasure! Form corporations with your friends while fighting a never-ending intergalactic war in this open-world online space adventure!
Why similar: MMORPG 35.7% ★, Space Sim 32.2% ★, Massively Multiplayer 9.8%, Space 8.8%, Adventure 5.7%
- #3 Space Aces
96% matchMixed63% of 350 reviews2026
Dev: DewEnforcerPub: Space Aces
Windows
Space Aces is an indie space shooter that plunges you into an online universe full of action, strategy, and fierce competition. Step into the cockpit and evolve from a rookie pilot into the most feared Ace in the galaxy!
Why similar: MMORPG 57.6% ★, Massively Multiplayer 24.8%, Space 11.4%, Sci-fi 3.5%, Action 2.7%
- #4 EVE Online
95% matchMostly Positive74% of 38,402 reviews2010
Dev: CCP
Windows · Mac
Median: 3.0 hrsMean: 136.7 hrs≥1hr: 73%
Over 20 years of legendary space battles! Explore a massive living universe of danger and opportunity in a challenging and highly rewarding space adventure. Fight, trade, build, and connect with a universe driven and shaped directly by players.
Why similar: Space Sim 48.2% ★, Massively Multiplayer 15.7%, Space 13.7%, Adventure 9%, Third Person 8%
- #5 Downfall MMORPG
94% matchMixed54% of 65 reviews2026
Dev: Rainmade Games
Windows
Downfall MMORPG is an open-world sci-fi & fantasy MMORPG where magic and technology collide. Choose a faction, forge your own playstyle, and fight for control of a living world in massive PvP battles and endless PvE adventures.
Why similar: MMORPG 51.7% ★, RPG 13.4%, Massively Multiplayer 13%, Adventure 8%, Sci-fi 5.2%
- #6 Astro Lords
94% matchMixed65% of 227 reviews2015
Dev: Aratog LLCPub: Conglomerate 5
Windows · Mac · Linux
Median: 48 minMean: 5.8 hrs≥1hr: 44%
Player bases are located on asteroids, which travel within the Oort Cloud. Once they’ve acquired the appropriate skills, players can control their asteroid’s movements. Mass-combat enthusiasts will love the Arena: here, players can battle it out against alien races or other Astro Lord players.
Why similar: MMORPG 36.2% ★, Space Sim 25.1% ★, Massively Multiplayer 13%, RPG 10.3%, Space 9.6%
- #7 Space Commander: War and Trade
93% matchMixed67% of 688 reviews2020
Dev: Home Net Games
Windows · Mac · Linux
Median: 1.2 hrsMean: 9.2 hrs≥1hr: 57%
Fight, explore the stars, trade, and lead your fleet across the galaxySpace Commander: War and Trade is an ultimate single player space-sim featuring spectacular graphics, intuitive combat and deep mechanics.
Why similar: Space Sim 34.6% ★, Flight 19.4%, RPG 14%, Aliens 10.2%, Base Building 8.2%
- #8 Subspace Discovery
92% matchMostly Positive75% of 131 reviews2023
Dev: FLICK Comp GmbH
Windows
Fly through Subspace, build your own ship, and engage in epic battles. Mine asteroids and research new technologies. Uncover the origins of the alien homeworld by solving weekly events in this Co-op PvE MMO.
Why similar: MMORPG 44.5% ★, Massively Multiplayer 17%, Space 13.1%, RPG 10.8%, Base Building 5.4%
- #9 Star Trek Online
91% matchMostly Positive79% of 20,893 reviews2012
Dev: Cryptic StudiosPub: Arc Games
Windows
Median: 6.8 hrsMean: 132.7 hrs≥1hr: 84%
In Star Trek Online, the Star Trek universe appears for the first time on a truly massive scale. Players take the captain's chair as they command their own starship and crew. Explore strange new worlds, seek out new life and new civilizations, and boldly go where no one has gone before.
Why similar: MMORPG 45.3% ★, Massively Multiplayer 17.7%, Space 12.3%, RPG 11.7%, Sci-fi 6.4%
- #10 Star Sonata 2
91% matchMixed68% of 289 reviews2020
Dev: Landauer Games
Windows
Median: 2.1 hrsMean: 59.8 hrs≥1hr: 60%
Star Sonata 2 is a space sandbox MMO that combines elements of action, RPG, and empire creation into a truly unique MMO. Explore the sandbox style universe, build persistent bases, construct trade ships, and even fight your way to the top and claim the Emperor’s Throne!
Why similar: MMORPG 38.7% ★, Space Sim 25.3% ★, RPG 10.2%, Robots 9.8%, Space 9.4%
- #11 Astroflux
90% matchMostly Positive72% of 343 reviews2016
Dev: Fula Fisken
Windows · Mac
Median: 3.1 hrsMean: 18.1 hrs≥1hr: 69%
Play Astroflux - a retro styled, action packed MMO space shooter.
Why similar: Massively Multiplayer 35.7%, RPG 26.8%, Adventure 15.8%, Space 15.3%, Action 4.2%
- #12 Gangs of Space
89% matchMostly Positive76% of 430 reviews2017
Dev: Little Big MMO
Windows · Mac · Linux
Median: 1.1 hrsMean: 281.6 hrs≥1hr: 53%
Gangs of Space is a massively-multiplayer Rogue Shmup where Gangs of players compete for the conquest of the galaxy.
Why similar: MMORPG 44.4% ★, Massively Multiplayer 21.1%, Top-Down Shooter 13.1%, Space 9.3%, RPG 7.3%
- #13 Shattered Void
86% matchMostly Positive71% of 90 reviews2024
Dev: yyy1505yyy
Windows · Linux
Space MMORPG where players can fly on different ships, collecting devices, subsystems and navigations or finding new weapons that will serve in battles. Take part in battles, explore the world, mine ore, trade, fight and build your own clan with a station.
Why similar: MMORPG 46.9% ★, Massively Multiplayer 24.1%, Space 16.3%, Sci-fi 5.9%, 2D 4.7%
- #14 VEGA Conflict
88% matchMixed58% of 4,985 reviews2015
Dev: KIXEYE
Windows · Mac
Median: 2.7 hrsMean: 90.8 hrs≥1hr: 63%
Stake your claim, command your fleets, and wage epic war in space.
Why similar: Massively Multiplayer 26.8%, Top-Down Shooter 25.5%, Space 21.7%, Base Building 10.6%, 2D 7.2%
- #15 Exocraft
87% matchMixed52% of 361 reviews2019
Dev: GoldFire Studios
Windows · Mac
Design unique spaceships and build the ultimate space mining fleet as you team up to battle for resources and glory in this massively multiplayer action strategy set in an alien wasteland.
Why similar: MMORPG 35% ★, Space Sim 27.9% ★, Massively Multiplayer 15.3%, Space 8.6%, Sci-fi 4.7%
- #16 Anarchy Online
85% matchVery Positive83% of 281 reviews2017
Dev: Funcom
Windows
Anarchy Online – the first ever science fiction MMO – is now on Steam! Compete and cooperate with thousands of players simultaneously on a vast, alien world. Join humanity nearly 30,000 years in the future in a world of perpetual conflict and scientific marvel.
Why similar: MMORPG 47.8% ★, Massively Multiplayer 21.4%, RPG 16.4%, Adventure 6.7%, Sci-fi 6.3%
- #17 Elite Dangerous
84% matchMostly Positive77% of 105,113 reviews2015
Dev: Frontier Developments
Windows
Median: 18.4 hrsMean: 146.5 hrs≥1hr: 89%
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.
Why similar: Space Sim 55.6% ★, Space 15.4%, Massively Multiplayer 13.8%, Sci-fi 5.4%, RPG 5%
- #18 Entropia Universe
82% matchMixed62% of 403 reviews2025
Dev: MindArk
Windows
Entropia Universe is a unique massively multiplayer online game (MMO) where virtual assets hold real-world value and players can participate in a thriving virtual sandbox economy.
Why similar: MMORPG 62.1% ★, Space 12.2%, RPG 8.4%, Sci-fi 6.2%, Massively Multiplayer 4.2%
- #19 Destiny 2
81% matchMostly Positive77% of 645,008 reviews2019
Dev: Bungie
Windows
Median: 9.9 hrsMean: 325.3 hrs≥1hr: 86%
Destiny 2 is an action MMO with a single evolving world that you and your friends can join anytime, anywhere, absolutely free.
Why similar: MMORPG 38.1% ★, Looter Shooter 27.2% ★, Massively Multiplayer 10.3%, Shooter 8.4%, Space 6.8%
- #20 Space Battle Royale
80% matchVery Positive86% of 80 reviews2023
Dev: MultiversalME
Windows
Welcome to cosmic chaos. This non-stop action arcade will test you to see if you are truly worthy of space travel. The full use of 3d space, five classes of weapons, and upgrades based on alien technology and alternative dimensions make for the most competitive and mind-expanding game out there.
Why similar: Flight 29.1%, Massively Multiplayer 24.5%, Space 16.8%, Shooter 14.9%, Sci-fi 7.4%
- #21 Nienix: Cosmic Warfare
79% matchVery Positive87% of 350 reviews2023
Dev: HolmCom
Windows · Mac · Linux
Search for the legendary lost artifact Nienix through galaxies in conflict! An open world space action RPG adventure that can be played both alone and together!
Why similar: Looter Shooter 30.2% ★, Flight 19.2%, Top-Down Shooter 17.5%, RPG 8.9%, Shooter 8.8%
- #22 Etherion Online
81% matchMixed51% of 70 reviews2023
Dev: iAppsBeats
Windows · Mac
Gear up! Become a prestige master in weapons or master a skill - join thousands of other players in this massive 2D adventure!
Why similar: MMORPG 43.3% ★, Top-Down Shooter 17.1%, Massively Multiplayer 15.4%, RPG 12.2%, Shooter 9.4%
- #23 Battle Arena
79% matchMixed64% of 55 reviews2019
Dev: ShadowWolf Games
Windows
Battle Arena is a multiplayer, immersive 2D Sci-Fi shooter! Plunge into the world of space battles and be the first!
Why similar: Massively Multiplayer 88.8%, Action 11.2%
- #24 Destination Sol
78% matchMostly Positive79% of 1,362 reviews2015
Dev: MovingBlocks
Windows · Mac · Linux
Median: 30 minMean: 3.8 hrs≥1hr: 30%
Pilot your ship in the seamless open world made of space, planets, and more. Find new ships and equipment, find allies and beat all the enemies in this open source space shooter!
Why similar: RPG 45.8%, Space 36.2%, 2D 8.4%, Action 6.2%, Sci-fi 3.4%
- #25 Spacelords
78% matchMixed53% of 3,261 reviews2017
Dev: MercurySteamPub: Mercury Steam Entertainment s.l.
Windows
Median: 1.2 hrsMean: 8.5 hrs≥1hr: 53%
Embark on an epic sci-fi, free-to-play adventure. Spacelords is a brand-new take on the shooter genre. Through its 4 vs 1 campaign, you experience both sides of the story: Join the Raiders in their fight to free the legendary Broken Planet, or switch sides and fight as the Antagonist alongside the invading hordes!
Why similar: Shooter 33.6%, Adventure 21.2%, Third Person 17.4%, Action 16.1%, Sci-fi 11.6%
- #26 CosmicBreak Universal
77% matchMixed58% of 1,410 reviews2021
Dev: CyberStep, Inc.
Windows
Median: 1.5 hrsMean: 18.2 hrs≥1hr: 60%
CosmicBreak Universal is an MMO action game that lets you play massive battles of up to 30 vs 30 players using customizable robots and humanoids! Create your own original character and aim for victory with your allies!
Why similar: Massively Multiplayer 23.4%, RPG 18.7%, Shooter 15.8%, Robots 11.2%, Adventure 9.6%
- #27 Nova Empire
77% matchMixed53% of 283 reviews2022
Dev: Gamebear Tech
Windows
Median: 1.9 hrsMean: 12.5 hrs≥1hr: 57%
Build up a Space Empire and establish control of the Galaxy and the Universe! Nova Empire is a multiplayer space game in which the aim is to build your empire and conquer the galaxy in epic space battles against your rivals with other allies worldwide!
Why similar: Space Sim 60.9% ★, Sci-fi 9.9%, Base Building 9.7%, Massively Multiplayer 6.9%, Space 6.8%
- #28 Pixel Starships
74% matchMostly Positive73% of 2,914 reviews2023
Dev: SavySoda
Windows · Mac · Linux
Median: 2.3 hrsMean: 24.8 hrs≥1hr: 64%
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.
Why similar: Space Sim 38.9% ★, Massively Multiplayer 14.3%, Space 11.1%, Aliens 10.1%, RPG 8.8%
- #29 Cosmic Miners
73% matchMixed58% of 60 reviews2025
Dev: bitByte Games
Windows
Explore asteroid fields, trade rare resources, and upgrade your ship in Cosmic Miners. Navigate faction alliances, complete missions, and rise through the ranks in a dynamic space adventure where your choices shape your path to cosmic power.
Why similar: Space Sim 43.8% ★, Flight 20%, Shooter 13.2%, Space 11.2%, Sci-fi 5.8%
- #30 Galaxy Control: 3D Strategy
76% matchMixed59% of 530 reviews2016
Dev: FX Games Media
Windows · Mac
Median: 1.1 hrsMean: 25.0 hrs≥1hr: 51%
Build your base and battle with other players to control the galaxy! Galaxy Control is an ultimate space combat strategy game with fast-paced combats! Gather minerals and extract uranium, defend your base with laser towers, missile turrets, cannons, walls and mines.
Why similar: Massively Multiplayer 68.1%, Space 29.1%, Action 2.8%
- #31 Starcom: Unknown Space
70% matchVery Positive93% of 4,082 reviews2024
Dev: Wx3 Labs, LLC
Windows
Median: 7.9 hrsMean: 16.2 hrs≥1hr: 82%
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.
Why similar: Space Sim 35.8% ★, Top-Down Shooter 17.7%, Space 15.3%, RPG 10.4%, Aliens 9%
- #32 Second Galaxy
74% matchMixed52% of 1,200 reviews2019
Dev: Zilong Game Limited
Windows
Median: 36 minMean: 9.4 hrs≥1hr: 38%
Second Galaxy is an open world sci-fi game that combines RPG and SLG elements. You can navigate hundreds of different space ships, team up with players to form alliances, and engage in intergalactic battles with other players around the world.
Why similar: Massively Multiplayer 38.8%, RPG 29.5%, Space 24.4%, Sci-fi 7.2%
- #33 Starfighter: Infinity
73% matchVery Positive91% of 129 reviews2019
Dev: Ben Olding Games
Windows · Mac · Linux
A space based MMORPG with a focus on ‘dogfighting’ style action and exploration. Features a huge array of ships, imaginative weapons and ship upgrades with more being added all the time. Explore the galaxy, fight other players, form your own organisations, mine asteroids to craft new items, loot rare weapons from alien races, and more...
Why similar: Massively Multiplayer 46.9%, RPG 39.1%, Space 13.9%
- #34 Project Entropy
72% matchMixed52% of 220 reviews2024
Dev: FunPlus International AG
Windows
Welcome, commander, to Project Entropy- an ultimate Sci-Fi and role-playing game with battles in space. In this immersive MMO experience, you will command alien civilizations, conquer uncharted planets, and build Hero fleets.
Why similar: Aliens 52.8%, Base Building 27.5%, Sci-fi 19.7%
- #35 Free Stars: The Ur-Quan Masters
70% matchVery Positive95% of 381 reviews2024
Dev: Pistol Shrimp
Windows · Mac
Experience the award-winning space saga. Travel to hyperspace, discover alien worlds, and meet an eclectic cast of characters. Find out what happened after the Ur-Quan invasion. And if the war still rages, fight for Earth and the Alliance of Free Stars!
Why similar: Top-Down Shooter 48.2%, RPG 31.1%, Sci-fi 8.9%, 2D 8.3%, Action 3.6%
- #36 SpaceBourne 2
68% matchMostly Positive77% of 4,992 reviews2025
Dev: Burak Dabak
Windows
Median: 2.4 hrsMean: 10.9 hrs≥1hr: 70%
Embark on a journey to greatness. Get ready for adrenaline-fueled battles and a chance to claim your place in the galaxy. Grab the controls of your ship, gear up for the fight, and unleash your ambition to conquer and build a new empire in the vastness of space.
Why similar: Space Sim 37.7% ★, Flight 22.8%, RPG 13.3%, Space 8.3%, Base Building 7.7%
- #37 Avorion
70% matchVery Positive90% of 14,288 reviews2020
Dev: Boxelware
Windows · Mac · Linux
Median: 18.6 hrsMean: 98.8 hrs≥1hr: 90%
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.
Why similar: Space Sim 44.1% ★, Flight 26%, Space 12.3%, Third Person 8.1%, Sci-fi 5.4%
- #38 The Infinite Black
73% matchMixed66% of 212 reviews2016
Dev: SpellbookPub: www.Spellbook.com
Windows · Mac · Linux
Median: 5.5 hrsMean: 83.9 hrs≥1hr: 73%
Fleet up with thousands of players in The Infinite Black -- The wildly popular online space combat and adventure game! Command massive spaceships, form powerful corporations, and battle it out in never-ending intergalactic warfare!
Why similar: Massively Multiplayer 44.4%, RPG 35.3%, Space 20.3%
- #39 Project Amalthea: Battlegrounds
72% matchMixed59% of 74 reviews2020
Dev: RunServer
Windows · Mac · Linux
There is a quarantine declared throughout the orbit so all the pilots are grounded except for the few ones allowed to participate in training battles. Join their ranks for blazing fast space battles with another players in this top-down shooter game
Why similar: Top-Down Shooter 22%, Massively Multiplayer 20.8%, Flight 17.1%, RPG 16%, Space 13.2%
- #40 EVERSPACE™ 2
68% matchVery Positive86% of 12,587 reviews2023
Dev: ROCKFISH Games
Windows · Mac
Median: 7.7 hrsMean: 29.1 hrs≥1hr: 87%
EVERSPACE 2 is a fast-paced single-player spaceship shooter with exploration in space and on planets, tons of loot, RPG elements, mining, and crafting. Experience an exciting sci-fi story set in a vivid, handcrafted open world full of secrets, puzzles, and perils.
Why similar: Looter Shooter 31.1% ★, Flight 18.2%, Shooter 12.5%, Space 11.3%, RPG 9.5%
- #41 Andromeda: Rebirth of Humanity
71% matchMixed65% of 116 reviews2021
Dev: Null Reference Games
Windows · Linux
Andromeda is a hybrid between a space 4X and an MMO for Android and PC. Get dropped into an online universe sandbox with 2 galaxies full of planets to colonize. Build structures like Mines to generate resources to build ships and engage in fleet battles with NPCs and other players.
Why similar: Space Sim 56.7% ★, Massively Multiplayer 15.3%, Space 10.6%, RPG 7.8%, Sci-fi 4.8%
- #42 Warspace 2
69% matchMixed61% of 82 reviews2025
Dev: Magic Game Art
Windows · Mac · Linux
Warspace 2 is a 1-4 player CO-OP space shooter with RPG elements, open-world and procedurally-generated galaxy. You can trade, craft, and fight your way through a universe, either solo or with friends.
Why similar: Space Sim 34% ★, Top-Down Shooter 20.3%, Aliens 10.3%, Space 10.2%, RPG 10.2%
- #43 STAR WARS™: The Old Republic™
67% matchVery Positive90% of 72,542 reviews2020
Dev: BroadswordPub: Electronic Arts
Windows
Median: 5.5 hrsMean: 66.5 hrs≥1hr: 78%
STAR WARS™: The Old Republic™ is a free-to-play MMORPG that puts you at the center of your own story-driven saga. Play as a Jedi, Sith, Bounty Hunter, or one of many other iconic STAR WARS roles in the galaxy far, far away over three thousand years before the classic films.
Why similar: MMORPG 56.3% ★, RPG 11.6%, Massively Multiplayer 11.5%, Space 6.8%, Adventure 4.5%
- #44 Interstellar Rift
69% matchMixed68% of 1,655 reviews2020
Dev: Split PolygonPub: Iceberg Interactive
Windows
Median: 4.2 hrsMean: 33.2 hrs≥1hr: 83%
Interstellar Rift is an open world starship simulator with an emphasis on ship construction and multi-player interaction. Survive in a hostile galaxy with your own custom designed and constructed starship. Invite other players to join your crew or fight them across the galaxy!
Why similar: Space Sim 53.1% ★, Aliens 15.2%, Space 12.4%, Adventure 7.1%, Sci-fi 5.7%
- #45 Drox Operative 2
68% matchVery Positive90% of 282 reviews2021
Dev: Soldak Entertainment
Windows · Linux
Drox Operative 2 is a starship action RPG with warring alien races, fierce space battles, a dynamic, evolving galaxy, and co-op multiplayer for Windows and Linux.
Why similar: RPG 63%, Space 20.3%, Action 8.9%, Sci-fi 7.8%
- #46 Astro Lords: Oort Cloud
71% matchMixed54% of 69 reviews2016
Dev: Aratog LLCPub: BISBOG SA
Windows
Astro Lords: Oort Cloud is a free-to-play, science-fiction MMORTS combining construction management with click-and-drag Artillery style combat and strategy elements such as exploration, raiding and espionage.
- #47 Iron Armada
66% matchMostly Positive77% of 177 reviews2024
Dev: Bluedrake42Pub: Drakeling Labs
Windows
Median: 1.8 hrsMean: 816.3 hrs≥1hr: 54%
Iron Armada is a multiplayer, space-faring combat game where players must team up to build a fleet of ships in order to survive the perils of space and defeat the opposing player faction. Build ships of all shapes and sizes, mine resources, and scavenge parts with friends to conquer the universe!
Why similar: Space 36.4%, Action 35.8%, Adventure 21.8%, 2D 6%
- #48 StarMade
69% matchMixed68% of 2,981 reviews2014
Dev: Schine GmbH
Windows · Mac · Linux
Median: 1.3 hrsMean: 18.8 hrs≥1hr: 54%
The ultimate space sandbox. Participate in epic fleet battles, form alliances, strive to dominate entire galaxies and harness the universe’s resources for your industrious empire or the destruction of others. Customise your experience, the universe is yours!
Why similar: Space 31.5%, Space Sim 29.2% ★, RPG 10.8%, Adventure 9.5%, Massively Multiplayer 8.7%
- #49 Deuterium Wars
67% matchMostly Positive78% of 602 reviews2019
Dev: Disquire
Windows
Deuterium Wars is a rapid 2D shooter. Create your own aircraft and plunge into heated battle with other players. What awaits you: an extensive role-playing system, craft, trading, and much more on a single server for all platforms.
Why similar: Massively Multiplayer 43.6%, RPG 29.5%, Shooter 17.1%, Action 5.6%, 2D 4.1%
- #50 Outerstellar
65% matchMostly Positive73% of 168 reviews2023
Dev: Strange Horizons Ltd
Windows
Stranded on a hostile and deadly planet, you must gather resources, build shelter, and fight to survive each night. But the secrets of this world await in a gripping sci-fi survival PvP game.
Why similar: Massively Multiplayer 20.8%, Shooter 19.8%, Space 17.2%, Base Building 13.3%, Third Person 11.7%