- #1 Space Commander: War and Trade
97% matchMixed67% of 694 reviews2020
Dev: Home Net Games
Windows · Mac · Linux
Median: 1.2 hrsMean: 9.2 hrs≥1hr: 56%
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 29.2%, Base Building 18%, Aliens 14.5%, Action RPG 11.3%, Space 9.3%
- #2 Star Hunter - Infinite Lagrange
96% matchMixed57% of 1,028 reviews2021
Dev: NetEase Games
Windows
Median: 2.4 hrsMean: 91.8 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 34.9%, Space Sim 23.7%, Space 19.7%, Base Building 15.3%, Multiplayer 6.4%
- #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 27.3%, RPG 12.2%, PvE 7.3%, 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 49%, MMORPG 28.5% ★, RPG 12.5%, Action RPG 9.9%
- #5 Beyond Orbit
94% matchNo user reviews2026
Dev: Beyond Orbit Games
Windows
A persistent-world space MMO where you mine, craft, trade, and fight alongside your guild. Build your ship, run dangerous routes, and pick a side in a three-way conflict centuries in the making.
Why similar: MMORPG 31% ★, Massively Multiplayer 27.1%, Space Sim 16.9%, Space 13.1%, Sci-fi 6.8%
- #6 Nova Era:Atom
93% 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 18%, MMORPG 17.7% ★, Space 12.6%, Space Sim 11.7%, Base Building 10.2%
- #7 Star Trek Online
92% matchMostly Positive79% of 21,049 reviews2012
Dev: Cryptic StudiosPub: Arc Games
Windows
Median: 6.8 hrsMean: 132.8 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%
- #8 Rixa
91% 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 25.9% ★, Massively Multiplayer 20.1%, Aliens 10.8%, Space 10.6%, Perma Death 8.1%
- #9 AQ2: Expanse
90% 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 20.3%, Space 10.2%, PvE 7.1%
- #10 Android Simulator
89% 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 14.6%, Cyberpunk 12.9%, Space 11.5%, Aliens 9.5%
- #11 Subspace Discovery
89% matchMostly Positive76% of 135 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 21.8%, Space 15.7%, Base Building 9.6%, PvE 9.1%
- #12 Sword Art Online: Integral Factor
88% matchMixed65% of 2,141 reviews2023
Dev: Asobimo, Inc.Pub: Bandai Namco Entertainment
Windows
Median: 1.3 hrsMean: 8.5 hrs≥1hr: 58%
Aim to conquer Aincrad with Kirito and Asuna
Why similar: MMORPG 35.8% ★, Massively Multiplayer 18%, Action RPG 9.9%, RPG 9.9%, Anime 9.4%
- #13 NosTale - Anime MMORPG
87% matchMostly Positive70% of 3,592 reviews2017
Dev: Entwell Co., Ltd.Pub: Gameforge 4D GmbH
Windows
Median: 1.0 hrsMean: 69.8 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 44.3% ★, Massively Multiplayer 25.5%, Anime 10.8%, Multiplayer 6.4%, RPG 5.6%
- #14 Crownless
86% matchNo user reviews
Dev: HolyTrinityGames
Windows
Forge your path in Crownless, an indie-fantasy MMORPG with many roads to explore. Discover dangerous worlds, experience meaningful progression, and engage with the community along your journey!
Why similar: MMORPG 34.3% ★, Massively Multiplayer 30.7%, PvE 9%, RPG 7.4%, Action RPG 5.7%
- #15 Legend of Ares
86% 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 69%, MMORPG 31% ★
- #16 Digimon Masters Online
84% matchMixed67% of 8,129 reviews2016
Dev: Move Games Co., Ltd.Pub: MOVE ON USA CO.
Windows
Median: 1.4 hrsMean: 86.1 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 38.8% ★, Massively Multiplayer 27.2%, Anime 11.4%, RPG 6.8%, Multiplayer 6.4%
- #17 Anarchy Online
83% matchVery Positive83% of 283 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 34.5%, Sci-fi 12.7%, RPG 8.8%, Cyberpunk 4.7%
- #18 DarkOrbit Reloaded
82% matchMostly Negative29% of 403 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 10.2%, Aliens 10%, RPG 8.3%
- #19 Spire Horizon Online
81% matchMixed67% of 352 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 33.9% ★, Massively Multiplayer 25.7%, Action RPG 9.7%, PvE 7.2%, Action-Adventure 6.3%
- #20 MythicMonsterOutlaws
82% matchNo user reviews
Dev: BestGameStudios
Windows
Skip the grind and dive into an MMO focused entirely on skill-based PvP and PvE combat. Unlock weapons and skills to expand your build variety, not your power. Competitive leaderboards, instanced raids, and fast-paced arenas—mythic combat starts the moment you create a character.
Why similar: MMORPG 37.7% ★, Massively Multiplayer 35.1%, PvE 8.7%, Multiplayer 8.6%, Action RPG 6.4%
- #21 Space Aces
80% matchMixed64% of 418 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 34.5%, Space 14.9%, PvE 8.2%, Sci-fi 6.1%
- #22 Ragnarok Online
81% matchMostly Positive71% of 2,409 reviews2013
Dev: Gravity Interactive
Windows
Median: 48 minMean: 41.7 hrs≥1hr: 45%
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 44.9% ★, Massively Multiplayer 30.7%, Anime 10.2%, RPG 8.7%, Multiplayer 5.5%
- #23 Pixel Starships
78% matchMostly Positive73% of 2,939 reviews2023
Dev: SavySoda
Windows · Mac · Linux
Median: 2.2 hrsMean: 24.5 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 24.7%, Massively Multiplayer 17%, Base Building 13%, Space 12.4%, Aliens 10.9%
- #24 Ragnarok Online 2
79% matchMixed58% of 3,211 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 43.2% ★, Massively Multiplayer 29.2%, Anime 10.7%, RPG 10.4%, Multiplayer 6.5%
- #25 Journey to Earth
78% 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%
- #26 The Infinite Black 2
77% matchVery Positive85% of 232 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 26.3% ★, Massively Multiplayer 16%, Space 13.5%, Sci-fi 7.4%
- #27 DREADHOLM
76% matchMixed65% of 31 reviews2026
Dev: DREADHOLM
Windows · Linux
A dark fantasy isometric online RPG featuring classes, randomized loot, instanced dungeons, and party-based boss fights. Built from scratch by a solo developer. Free to play, no microtransactions.
Why similar: MMORPG 33.4% ★, Massively Multiplayer 25.3%, Action RPG 14.3%, PvE 12.9%, RPG 9.7%
- #28 Astro Lords
76% matchMixed65% of 230 reviews2015
Dev: Aratog LLCPub: Conglomerate 5
Windows · Mac · Linux
Median: 48 minMean: 6.0 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 18.9%, Space 13%, Sci-fi 8.1%
- #29 Futurika Online
75% 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 14.1%, Action RPG 11.6%, PvE 9.4%
- #30 AEXXOS
74% matchMixed49% of 37 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 37.2% ★, Massively Multiplayer 25.2%, Sci-fi 10.1%, Space 9.7%, RPG 9.1%
- #31 Galactic Vanguard
75% 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 24.1%, Space 16.8%, Sci-fi 10.7%, Base Building 10.5%
- #32 Elite Dangerous
74% matchMostly Positive77% of 105,919 reviews2015
Dev: Frontier Developments
Windows
Median: 18.3 hrsMean: 147.5 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 19.3%, Massively Multiplayer 18.5%, Sci-fi 9%, Multiplayer 6.2%
- #33 Infinity: Battlescape
73% matchVery Positive80% of 754 reviews2019
Dev: I-Novae Studios, LLC
Windows
Median: 3.1 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 34.1%, Space Sim 31.2%, Space 23.2%, Sci-fi 8.6%, PvE 2.9%
- #34 Dream Of Mirror Online
73% matchMixed59% of 558 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 41.3%, MMORPG 33.1% ★, Anime 10%, RPG 8.5%, Multiplayer 7.2%
- #35 depthminer
72% 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 24.3%, Perma Death 15%, Base Building 14.3%, Multiplayer 8.7%
- #36 Starship Empire
71% 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 40.6%, MMORPG 23.4% ★, Space 17%, Sci-fi 8.8%, RPG 7.2%
- #37 Dragon Saga
72% matchMixed65% of 1,506 reviews2015
Dev: Gravity Interactive
Windows
Median: 1.2 hrsMean: 38.3 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 44.6% ★, Massively Multiplayer 32.4%, Anime 10.1%, RPG 7.5%, Multiplayer 5.4%
- #38 Search of Galaxy
71% 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 16.6%, Base Building 13.7%, Space 9.9%
- #39 Starcom: Unknown Space
68% matchVery Positive93% of 4,302 reviews2024
Dev: Wx3 Labs, LLC
Windows
Median: 8.4 hrsMean: 16.9 hrs≥1hr: 83%
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 28.7%, Space 22%, Aliens 12.3%, Action RPG 12%, Sci-fi 8.5%
- #40 Runes of Magic
70% matchMixed69% of 1,522 reviews2018
Dev: Runewaker EntertainmentPub: Gameforge 4D GmbH
Windows
Median: 1.0 hrsMean: 36.5 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 29.4%, RPG 7.5%, Action RPG 6.9%, Multiplayer 6.1%
- #41 Star Sonata 2
70% matchMixed67% of 290 reviews2020
Dev: Landauer Games
Windows
Median: 2.1 hrsMean: 60.0 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 19.1%, Base Building 13.1%, Space 12.5%
- #42 Fiesta Online NA
71% matchMixed63% of 790 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 41.9%, MMORPG 30.8% ★, Anime 13.6%, RPG 9.8%, Multiplayer 4%
- #43 Starheim
69% 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 24.6%, Cyberpunk 15.1%, Space 13.5%, Sci-fi 6.4%
- #44 Knight Online
69% matchMixed51% of 11,179 reviews2016
Dev: Noah SystemPub: NTTGame
Windows
Median: 48 minMean: 163.5 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 51.9% ★, Massively Multiplayer 28%, Multiplayer 6.6%, Action RPG 4.6%, RPG 4%
- #45 Rover Mechanic Challenge - ERC Competition
69% matchMostly Positive76% of 17 reviews2020
Dev: Pyramid Games S.A.
Windows
𝗘𝗥𝗖 𝗥𝗼𝘃𝗲𝗿 𝗠𝗲𝗰𝗵𝗮𝗻𝗶𝗰 𝗖𝗵𝗮𝗹𝗹𝗲𝗻𝗴𝗲 is an e-tournament based on the world's only simulator for repairing Mars Rovers. Take part in solving challenging tasks and become the master of leader board.
Why similar: Space Sim 49.4%, Competitive 30.3%, Space 20.3%
- #46 Tower of Fantasy
67% matchMixed66% of 11,982 reviews2022
Dev: Hotta StudioPub: Perfect World Games
Windows
Median: 2.3 hrsMean: 54.4 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 11.1%, Cyberpunk 10.6%, Massively Multiplayer 10.5%, Action RPG 10%
- #47 Conflict RPG
67% 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 20.9%, Action RPG 14.3%, PvE 13.5%, RPG 9.5%
- #48 Neverwinter
66% matchMostly Positive77% of 39,459 reviews2013
Dev: Cryptic StudiosPub: Arc Games
Windows
Median: 6.3 hrsMean: 40.5 hrs≥1hr: 83%
Neverwinter is a free, action MMORPG based on the acclaimed Dungeons & Dragons fantasy roleplaying game. Epic stories, action combat and classic roleplaying await those heroes courageous enough to enter the fantastic world of Neverwinter!
Why similar: MMORPG 50.2% ★, Massively Multiplayer 27%, RPG 8.1%, Multiplayer 7.9%, Action RPG 3.8%