- #1 Space Commander: War and Trade
97% 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 29% ★, Base Building 18.1%, Aliens 14.5%, Action RPG 11.3%, Space 9.3%
- #2 Star Hunter - Infinite Lagrange
96% matchMixed57% of 1,011 reviews2021
Dev: NetEase Games
Windows
Median: 2.4 hrsMean: 92.7 hrs≥1hr: 61%
In a remote corner of the Milky Way, you, a star hunter, will control a fleet, take on a wide variety of bounty contracts and missions, and venture into the vastness of space. You will hunt for mysterious items for your employers and explore specific targets in uncharted territory.
Why similar: Massively Multiplayer 35.2%, Space Sim 23.4% ★, Space 19.6%, Base Building 15.5%, Multiplayer 6.2%
- #3 Sprite Fantasia
95% matchMixed51% of 282 reviews2021
Dev: X-Legend Entertainment Co., Ltd.
Windows
Lively and funny, warm and healing, the most hilarious and tearful MMORPG!"Master~ I need you!" A hilarious MMORPG that doesn't ask you to save the world.[Download now] to get rare sprite cards!"
Why similar: MMORPG 42.6% ★, Massively Multiplayer 27.2%, RPG 12.2%, PvE 7.4%, Multiplayer 7.2%
- #4 Rebirth Online
94% matchMixed43% of 351 reviews2020
Dev: Caret Games
Windows
Adventures await in a world brought to life by realistic graphics! Experience genuine adventures in the grand world of Rebirth Online. Battle, craft, explore, and combine different types of equipment and abilities to create your own style of play.
Why similar: Massively Multiplayer 48.9%, MMORPG 28.6% ★, RPG 12.6%, Action RPG 9.9%
- #5 Star Trek Online
94% 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 29.9% ★, Massively Multiplayer 25.6%, Space 16.7%, Sci-fi 11.6%, RPG 5.6%
- #6 Rixa
92% matchNo user reviews
Dev: NOT ANOTHER 2D PLATFORMER STUDIOS
Windows
Team up with friends as a melee enjoyer or use unethical ranged abilities to fight the alien menace in this Sci-fi meets Fantasy MMORPG. That's right.. SCI-FI MMORPG!! Explore the planet of Rixa using a unique NanoBot ability system and a host of weapons at your disposal. For the Queen!!!!
Why similar: MMORPG 26% ★, Massively Multiplayer 20%, Aliens 10.7%, Space 10.6%, Perma Death 8.1%
- #7 AQ2: Expanse
91% matchNo user reviews
Dev: Seven Point Red Ltd
Windows
AQ2: Expanse is a massively multiplayer space strategy game. A single persistent universe with open PvP and PvE. Fight for control over the Aquila system's sectors in huge corporation wars, play with everyone, play in a group or play solo with plenty to explore.
Why similar: MMORPG 23.9% ★, Space Sim 23.9% ★, Massively Multiplayer 20.2%, Space 10.2%, PvE 7.2%
- #8 Android Simulator
91% matchNo user reviews
Dev: Games Incubator
Windows
Android Simulator is a futuristic FPS game in which you take the role of an android who is in charge of a spaceship colony. Keep a firm hand on the flight route and manage the right water balance for plants, oxygen level, and spacecraft parameters to securely deliver the colonizers.
Why similar: Space Sim 27.2% ★, Base Building 14.7%, Cyberpunk 12.9%, Space 11.5%, Aliens 9.5%
- #9 Subspace Discovery
89% 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 25.9% ★, Massively Multiplayer 21.6%, Space 15.7%, Base Building 9.6%, PvE 9.3%
- #10 Sword Art Online: Integral Factor
89% matchMixed65% of 2,124 reviews2023
Dev: Asobimo, Inc.Pub: Bandai Namco Entertainment
Windows
Median: 1.3 hrsMean: 8.6 hrs≥1hr: 58%
Aim to conquer Aincrad with Kirito and Asuna
Why similar: MMORPG 35.9% ★, Massively Multiplayer 17.9%, RPG 9.9%, Action RPG 9.9%, Anime 9.4%
- #11 NosTale - Anime MMORPG
88% matchMostly Positive70% of 3,577 reviews2017
Dev: Entwell Co., Ltd.Pub: Gameforge 4D GmbH
Windows
Median: 1.0 hrsMean: 70.6 hrs≥1hr: 50%
NosTale is a free-to-play anime action MMORPG which takes you on an exciting journey through a world full of mystery with your friends. More than 30 specialist classes and tons of loyal pets provide plenty of excitement and variety in PvP, PvE and raids
Why similar: MMORPG 44.4% ★, Massively Multiplayer 25.3%, Anime 10.9%, Multiplayer 6.4%, RPG 5.6%
- #12 Nova Era:Atom
87% matchNo user reviews
Dev: 广州市星杰网络科技有限公司Pub: 广州市玩童互动娱乐有限公司
Windows
Welcome to the first trailer of Nova Era: Atom, Welcome to Nova Era: Atom, a sci-fi MMORPG game blending Chinese mythology. where you can DIY your own custom spaceship and explore the endless mysteries of the cosmos.
Why similar: Massively Multiplayer 21.9%, MMORPG 19.6% ★, Space 15.5%, Base Building 12.4%, Sci-fi 9.4%
- #13 Digimon Masters Online
86% matchMixed67% of 8,129 reviews2016
Dev: Move Games Co., Ltd.Pub: MOVE ON USA CO.
Windows
Median: 1.4 hrsMean: 85.5 hrs≥1hr: 57%
DMO is MMO featuring the ever-popular Digimon franchise. This long awaited game will feature a deeper RPG experience, enhanced graphics and adrenaline-pumping real-time combat. Both new and long-time Digimon fans can now immerse themselves into this new epic adventure with their very own Digimons.
Why similar: MMORPG 38.9% ★, Massively Multiplayer 27.1%, Anime 11.4%, RPG 6.8%, Multiplayer 6.4%
- #14 DarkOrbit Reloaded
85% matchMostly Negative28% of 346 reviews2025
Dev: Bigpoint GmbH
Windows
Dark Orbit is a free-2-play space MMO where three companies battle for galactic domination. Customize ships, trade resources, fight aliens and uncover a grand conspiracy on your epic cosmic journey. Thrilling PvP and PvE missions await! Will you lead your faction beyond the final frontier?
Why similar: MMORPG 29.9% ★, Space Sim 25.5% ★, Massively Multiplayer 10.1%, Aliens 10%, RPG 8.3%
- #15 Spire Horizon Online
84% matchMixed68% of 346 reviews2024
Dev: Mendoka
Windows
Spire Horizon Online is an MMORPG where players become skeleton adventurers on a quest to find their capybara friend. Choose from a variety of classes, battle numerous monsters, and explore diverse regions.
Why similar: MMORPG 34% ★, Massively Multiplayer 25.6%, Action RPG 9.7%, PvE 7.3%, Action-Adventure 6.3%
- #16 Anarchy Online
84% 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 35.1% ★, Massively Multiplayer 34.4%, Sci-fi 12.7%, RPG 8.8%, Cyberpunk 4.7%
- #17 Space Aces
82% 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 36.4% ★, Massively Multiplayer 34.3%, Space 14.9%, PvE 8.3%, Sci-fi 6.1%
- #18 Ragnarok Online
83% matchMostly Positive71% of 2,396 reviews2013
Dev: Gravity Interactive
Windows
Median: 48 minMean: 41.8 hrs≥1hr: 46%
In the world of Rune Midgard, it was a time of strife between the Gods, Humans and demons...Battle weary from the long war's carnage, the factions entered into an uneasy truce. The truce grew into a fragile peace that lasted for a thousand years.
Why similar: MMORPG 45% ★, Massively Multiplayer 30.6%, Anime 10.2%, RPG 8.7%, Multiplayer 5.5%
- #19 Pixel Starships
82% 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 24.6% ★, Massively Multiplayer 16.9%, Base Building 13%, Space 12.4%, Aliens 10.9%
- #20 Journey to Earth
80% match2 user reviews100% of 2 reviews2024
Dev: Digital Kingdom
Windows
You are an experienced astronaut, stranded in space. Will you reach Earth, or will you get lost in space and die?
Why similar: Space Sim 25.9% ★, Science 16.6% ★, Space 14.2%, Aliens 12.1%, Action RPG 10.1%
- #21 Ragnarok Online 2
81% matchMixed58% of 3,203 reviews2013
Dev: Gravity, Inc.Pub: Gravity Interactive
Windows
Median: 2.1 hrsMean: 21.2 hrs≥1hr: 65%
Return to the beautiful and dangerous world of Midgard! Inspired by Norse mythology, the much-anticipated sequel to the groundbreaking Ragnarok Online has arrived! Immerse yourself in the new, but recognizable world of Ragnarok 2.
Why similar: MMORPG 43.3% ★, Massively Multiplayer 29.1%, Anime 10.7%, RPG 10.4%, Multiplayer 6.5%
- #22 Futurika Online
78% matchNo user reviews
Dev: Timty
Windows · Linux
Futurika Online is a free-to-play, pixel art cyberpunk MMORPG with real-time combat and story-driven progression. Play for free!
Why similar: MMORPG 28.2% ★, Cyberpunk 18.9%, Massively Multiplayer 14%, Action RPG 11.6%, PvE 9.6%
- #23 AEXXOS
77% matchMixed50% of 36 reviews2026
Dev: SPARTAN GAMES
Windows
Command 25 ship variants with 20+ upgrades in a living, multiplayer galaxy. Explore, trade, mine, and fight epic real-time battles. Forge alliances or betray rivals—your choices shape the universe. Dive into stunning space combat now!
Why similar: MMORPG 37.3% ★, Massively Multiplayer 25.1%, Sci-fi 10.1%, Space 9.7%, RPG 9.1%
- #24 Astro Lords
79% 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 23.8% ★, Space Sim 19.3% ★, Massively Multiplayer 18.8%, Space 13%, Sci-fi 8.1%
- #25 Galactic Vanguard
78% matchNo user reviews
Dev: Galactic Studio
Windows
In Galactic Vanguard, embark on an epic adventure across a galaxy filled with mystery and conflict. As a brave space explorer, your choices will shape the fate of planets and civilizations. Discover uncharted worlds, engage in strategic battles, and forge your path in this handcrafted universe.
Why similar: Space Sim 27.5% ★, Massively Multiplayer 24%, Space 16.8%, Sci-fi 10.7%, Base Building 10.6%
- #26 The Infinite Black 2
76% 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: Space Sim 27.8% ★, MMORPG 26.4% ★, Massively Multiplayer 15.9%, Space 13.5%, Sci-fi 7.4%
- #27 Elite Dangerous
77% 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 39.5% ★, Space 19.4%, Massively Multiplayer 18.4%, Sci-fi 9%, Multiplayer 6.2%
- #28 Infinity: Battlescape
74% matchVery Positive80% of 751 reviews2019
Dev: I-Novae Studios, LLC
Windows
Median: 2.9 hrsMean: 10.0 hrs≥1hr: 74%
Infinity: Battlescape is a multiplayer space combat sim supporting hundreds of players on a single server. Join one of the corporate factions and fight for domination of a seamless, true-to-scale procedural star system. Participate in massive space and planetary battles involving hundreds of ships.
Why similar: Massively Multiplayer 34%, Space Sim 31.2% ★, Space 23.2%, Sci-fi 8.6%, PvE 3%
- #29 Legend of Ares
75% matchMixed55% of 67 reviews2017
Dev: Bono GamesPub: RedFox Games
Windows
Legend of Ares is a MMORPG set in a medieval fantasy featuring the God of War, Ares mythology. Players can choose two different faction to join either The Empire or The Alliance featuring four different classes Knight, Spearman, Archer, and Sorcerer.
Why similar: Massively Multiplayer 68.9%, MMORPG 31.1% ★
- #30 depthminer
74% matchNo user reviews
Dev: George Cowden (Art, Programming, Producer)Pub: Lobodious
Windows
Burn down the server in this upcoming survival mmo
Why similar: MMORPG 24.7% ★, Massively Multiplayer 24.1%, Perma Death 15.1%, Base Building 14.4%, Multiplayer 8.7%
- #31 Dream Of Mirror Online
75% matchMixed59% of 557 reviews2015
Dev: SoftStarPub: SubaGames
Windows
Median: 24 minMean: 12.4 hrs≥1hr: 36%
Behold an anime-themed land of wonders, friendship and skill, shrouded in the mysteries of an ancient world yours to explore. Forge relationships and find new friends, take up a job, or soar through the majestic skies as you rediscover a social MMORPG beloved by many around the world!
Why similar: Massively Multiplayer 41.2%, MMORPG 33.2% ★, Anime 10%, RPG 8.5%, Multiplayer 7.2%
- #32 Search of Galaxy
73% matchMixed56% of 25 reviews2022
Dev: DRAGONnoid
Windows
After the supernova explosion, the Thermian race was destroyed. All knowledge, technologies and data about the past were lost. You must to restore civilization and explore the territories of your home system in search of lost technologies and artifacts.
Why similar: Space Sim 25% ★, Science 18% ★, Aliens 16.5%, Base Building 13.8%, Space 9.9%
- #33 Dragon Saga
73% matchMixed65% of 1,501 reviews2015
Dev: Gravity Interactive
Windows
Median: 1.1 hrsMean: 38.5 hrs≥1hr: 53%
Dragon Saga is a f2p arcade style side scrolling 3D Fantasy MMORPG set in a world of Dragons and magic. Choose one of four classes (Warrior, Mage, Thief, and Archer) and explore a rich world filled with unique monsters. Power up to unlock devastating abilities, hidden combos and hilarious effects.
Why similar: MMORPG 44.7% ★, Massively Multiplayer 32.3%, Anime 10.1%, RPG 7.5%, Multiplayer 5.4%
- #34 Starship Empire
73% matchNo user reviews
Dev: Bantam City Games
Windows · Linux
Starship Empire is an intense PvP-filled space MMO where you not only lead your ship into epic battles, but manage the entire crew inside!
Why similar: Massively Multiplayer 40.4%, MMORPG 23.5% ★, Space 17.1%, Sci-fi 8.9%, RPG 7.2%
- #35 Runes of Magic
72% matchMixed69% of 1,508 reviews2018
Dev: Runewaker EntertainmentPub: Gameforge 4D GmbH
Windows
Median: 1.0 hrsMean: 32.4 hrs≥1hr: 51%
Start your heroic saga today in a world full of magic and excitement: Choose your race, build a home and discover the fantastic world of Taborea in the classic free-to-play MMO!
Why similar: MMORPG 42.9% ★, Massively Multiplayer 29.3%, RPG 7.5%, Action RPG 6.9%, Multiplayer 6.1%
- #36 Starcom: Unknown Space
69% 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 28.9% ★, Space 21.9%, Aliens 12.3%, Action RPG 12%, Sci-fi 8.5%
- #37 Fiesta Online NA
72% matchMixed63% of 787 reviews2014
Dev: gamigo AG
Windows
Median: 1.8 hrsMean: 42.6 hrs≥1hr: 65%
Gather your fearless allies in the heart-pounding realms of Fiesta Online, where the fate of Isya rests on your shoulders. Prepare to wage war against the malevolent grip of Legel's corruption, forging powerful bonds with fellow adventurers as you embark on quests that will push you to your limits.
Why similar: Massively Multiplayer 41.7%, MMORPG 30.9% ★, Anime 13.6%, RPG 9.8%, Multiplayer 4%
- #38 Starheim
71% matchMostly Negative41% of 17 reviews2023
Dev: Null Reference Games
Windows
Starheim is a free to play spaceship piloting MMO set in a universe based on Norse mythology. Materials collected by destroying AI ships, other players, and mining asteroids can be used to upgrade your ship, with dozens of models to choose from on your journey from a small fighter to a dreadnought.
Why similar: Space Sim 29.1% ★, Massively Multiplayer 24.5%, Cyberpunk 15.1%, Space 13.5%, Sci-fi 6.4%
- #39 Star Sonata 2
71% 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 25% ★, Science 19.7% ★, Space Sim 19% ★, Base Building 13.2%, Space 12.4%
- #40 Knight Online
70% matchMixed51% of 11,100 reviews2016
Dev: Noah SystemPub: NTTGame
Windows
Median: 48 minMean: 163.2 hrs≥1hr: 47%
The Great Battle between Karus and El Morad has arrived to Steam! Pledge allegiance to one of the Nations and put your skills to the test in one of the best PvP system in the MMORPG universe!
Why similar: MMORPG 52.1% ★, Massively Multiplayer 27.8%, Multiplayer 6.7%, Action RPG 4.5%, RPG 4.1%
- #41 SPACERIFT: Arcanum System
68% matchMostly Positive77% of 495 reviews2020
Dev: Arcanum Team
Windows
Median: 54 minMean: 10.2 hrs≥1hr: 44%
At the sunset of human life on planet Earth, you are a military pilot controlling a space ship, and you find yourself at the very epicenter of the battle in the solar system. You are forced to retreat into the unknown, distant Arcanum system through hyper-jumping.
Why similar: Space Sim 27.7% ★, Massively Multiplayer 22.9%, MMORPG 19.6% ★, Space 12.5%, Sci-fi 9.3%
- #42 AVABEL ONLINE(Steam版)
70% matchMostly Negative29% of 241 reviews2020
Dev: Asobimo, Inc.
Windows
Enjoy the "Tower Scramble", where up to 1,000 players can fight at once, Guild & Team Battles, 1-on-1, and strategic PvP battles that will leave your palms sweating!
Why similar: MMORPG 49.8% ★, Massively Multiplayer 21.4%, Action RPG 11.2%, RPG 8.2%, Multiplayer 5.6%
- #43 Conflict RPG
68% matchNo user reviews
Dev: Roderick Phillips
Windows
Conflict is a Rpvp game with a emphasis on social interaction
Why similar: MMORPG 33.4% ★, Massively Multiplayer 20.8%, Action RPG 14.2%, PvE 13.7%, RPG 9.5%
- #44 Prism 2033
67% matchNo user reviews
Dev: CyberNest Entertainment Limited
Windows
Prism 2033 is a next-generation Futuristic Parallel-Universe MMORPG built with Unreal Engine 5. Travel across parallel worlds, take on new challenges, and shape the future of the Parallverse.
Why similar: MMORPG 37.3% ★, PvE 14.4%, Massively Multiplayer 13.7%, Cyberpunk 13.4%, RPG 10.6%
- #45 Downfall MMORPG
66% 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 40.9% ★, Massively Multiplayer 22.5%, Sci-fi 11.1%, RPG 7.7%, Space 7.4%
- #46 SpaceCraft
67% matchNo user reviews
Dev: Shiro Games
Windows
The Universe is yours. SpaceCraft is an online space exploration and building game. Explore a vast galaxy of solar systems and planets, mine and craft resources, design and build ships, automate planetary bases and interplanetary logistics, trade and cooperate.
Why similar: Space Sim 24.8% ★, Massively Multiplayer 17.8%, Space 14.3%, Base Building 13.7%, Sci-fi 9.3%
- #47 BrawlQuest
67% matchMostly Positive75% of 88 reviews2022
Dev: Luven Interactive LTD
Windows
BrawlQuest is a game about hitting stuff, mining stuff, crafting stuff, building stuff and generally vibing. It's designed around simplicity, and doesn't bother with intrusive micro transactions or subscription models.
Why similar: MMORPG 37.3% ★, Massively Multiplayer 35%, Action RPG 10.8%, RPG 10.1%, Action-Adventure 6.7%
- #48 Tower of Fantasy
66% matchMixed67% of 11,925 reviews2022
Dev: Hotta StudioPub: Perfect World Games
Windows
Median: 2.3 hrsMean: 54.1 hrs≥1hr: 69%
Embark together on your fantasy adventure! Set hundreds of years in the future on the distant planet of Aida, the shared open-world RPG, anime-infused sci-fi adventure Tower of Fantasy now is officially available on Steam.
Why similar: MMORPG 38.6% ★, Anime 11%, Cyberpunk 10.7%, Massively Multiplayer 10.3%, Action RPG 10%