- #1 Planets Under Attack
97% matchMostly Positive73% of 1,250 reviews2012
Dev: Targem GamesPub: Topware Interactive
Windows · Mac
Median: 3.3 hrsMean: 9.9 hrs≥1hr: 86%
Play as humans or robots in a brand new sci-fi strategy adventure! Travel into the far reaches of space, through cleverly designed star constellations and variable game modes, conquering enemy planets using 15 combinable technologies.
Why similar: Strategy 96%, Indie 4%
- #2 ProtoGalaxy
96% matchMixed58% of 69 reviews2010
Dev: Source Studio Ltd.
Windows
Median: 12 minMean: 4.7 hrs≥1hr: 25%
Earth is under siege! A mysterious and powerful alien race has come to enslave the entire galaxy, and your fleet is humanity's last hope. You must put an end to the attacks and rebuild a home for the survivors.
Why similar: Indie 100%
- #3 Sins of a Solar Empire: Trinity®
96% matchMostly Positive77% of 816 reviews2011
Dev: Ironclad Games CorporationPub: Stardock Entertainment
Windows
Median: 2.0 hrsMean: 30.8 hrs≥1hr: 59%
In Sins of a Solar Empire: Trinity, you are the leader of a civilization embroiled in a galactic war, fighting for the survival of your entire race against relentless foes.
Why similar: Strategy 100%
- #4 Star Ruler 2
95% matchVery Positive82% of 721 reviews2015
Dev: Blind Mind Studios
Windows · Linux
Median: 4.0 hrsMean: 8.9 hrs≥1hr: 93%
Massive scale 4X-RTS set in space. Control hundreds of planets, manipulate galactic politics, research numerous advanced technologies, and command thousands of units and hundreds of planets in your quest for galactic dominance.
Why similar: Strategy 81.5%, Indie 18.5%
- #5 Imperium Galactica
94% matchVery Positive93% of 157 reviews2017
Dev: Digital RealityPub: THQ Nordic
Windows
Imperium Galactica. The Universe is yours... if you can handle it. The fourth millennium. Mankind has colonised the galaxy. Created an Empire. Now, it is crumbling. The aliens are restless. The oppressed are building armies. And a strange invader is headed for the heart of the Empire.
Why similar: Strategy 100%
- #6 Galaxy Reavers
94% matchMixed69% of 205 reviews2016
Dev: Good Games
Windows
This is a fun yet challenging RTS game. To survive in the vast galaxy, you need to build up your own fleet and customize your warships. You will also learn to control them efficiently in battle to defeat your enemies, conquer planets, and expand your galactic empire!
Why similar: Strategy 82.8%, Indie 17.2%
- #7 StarFringe: Adversus
92% matchMixed64% of 235 reviews2023
Dev: CasualogicPub: Conglomerate 5
Windows
This is the story about the beginning of the conquest of outer space by earthlings. It began as a global idea of saving mankind from hunger and lack of resources, and ended as a brutal and merciless war in space far from Earth.
Why similar: Strategy 74.9%, Indie 25.1%
- #8 Ground Control II: Operation Exodus
91% matchVery Positive89% of 329 reviews2015
Dev: Massive EntertainmentPub: Rebellion
Windows
Median: 30 minMean: 8.2 hrs≥1hr: 39%
It’s 2741 and the universe is at war. The Terran Empire is laying siege to the NSA, a treaty of colonies that upholds freedom and democracy. After losing the battle in space, the NSA is forced to retreat to its last stronghold. Can you snatch victory from impending doom?
Why similar: Strategy 100%
- #9 Master of Orion 2
91% matchOverwhelmingly Positive96% of 1,744 reviews2016
Dev: SimTexPub: Wargaming Labs
Windows · Mac · Linux
Median: 24 minMean: 11.3 hrs≥1hr: 43%
Forge an empire in a universe where population growth is stripping away planetary resources. Colonize unknown planets and trade with other races for their knowledge.
Why similar: Strategy 100%
- #10 Nexus - The Jupiter Incident
90% matchVery Positive86% of 1,085 reviews2007
Dev: Mithis GamesPub: THQ Nordic Mobile
Windows
Median: 1.9 hrsMean: 12.0 hrs≥1hr: 65%
Ambitious megacorporations monopolize the conquest of space and the colonization of the solar system. At the very edge of the solar system, the companies make a discovery that will shift the technological advantage and upset the balance. And so a new conflict is born: "The Jupiter Incident."
Why similar: Strategy 89.8%, Indie 10.2%
- #11 Nomad Fleet
89% matchMixed66% of 214 reviews2016
Dev: Autarca
Windows · Mac · Linux
Median: 3.1 hrsMean: 3.2 hrs≥1hr: 79%
Nomad Fleet is a RTS game where you must lead the last remnants of Mankind to safety after a mysterious alien race has hunted them near extinction. Lead a fully armed fleet of battleships, carriers and fighters through a series of randomized scenarios and encounters where they must fight for their survival while scavenging for resources,...
Why similar: Strategy 75.7%, Indie 24.3%
- #12 Periphery Online
86% matchMixed72% of 54 reviews2026
Dev: Aleksandr Nagaev
Windows
A refugee capsule lands on an uninhabited planet. You have to survive, rebuild civilization and, if possible, regain control over the Earth. One big universe, one endless pvp session for all players.
Why similar: Strategy 94.4%, Indie 5.6%
- #13 Sins of a Solar Empire II
84% matchVery Positive84% of 8,614 reviews2024
Dev: Ironclad Games CorporationPub: Stardock Entertainment
Windows
Median: 9.5 hrsMean: 32.4 hrs≥1hr: 85%
Battle for galactic dominance in this real-time 4X strategy game with unrivaled scale! You’ll explore, expand, exploit, and exterminate through military force, diplomacy, trade, culture, influence, and other underhanded tactics.
Why similar: Strategy 100%
- #14 UFO: Afterlight
89% matchMixed66% of 537 reviews2014
Dev: Altar GamesPub: Bohemia Interactive
Windows
Median: 12 minMean: 9.6 hrs≥1hr: 29%
The story is situated on Mars. It starts where UFO: Aftermath left off and runs simultaneously with UFO: Aftershock. While the Laputans on Earth are fighting Wargots and Starghosts and finding out what caused the destruction of their home planet, a small colony on Mars is trying to survive and flourish.
Why similar: Strategy 86.6%, Indie 13.4%
- #15 Polaris Sector
88% matchMostly Positive72% of 475 reviews2016
Dev: SoftWarWarePub: Slitherine Ltd.
Windows
Can anyone build an empire in a place like this? Other factions are naturally suspicious of newcomers and may wage war at the first sign of unidentified craft. Here, a natural death is an uncommon luxury.
Why similar: Strategy 100%
- #16 O.R.B: Off-World Resource Base
87% matchMostly Positive79% of 107 reviews2014
Dev: Strategy First
Windows
Median: 18 minMean: 37.5 hrs≥1hr: 41%
An epic struggle for control!
Why similar: Strategy 100%
- #17 Icarus Starship Command Simulator
86% matchVery Positive90% of 52 reviews2017
Dev: Steven Eric Boyette
Windows
In this "starship command simulator" you will fight your way to the center of a randomly generated galaxy where a massive star is about to go supernova and destroy all life. Can you find a way to stop it?
Why similar: Strategy 71.1%, Indie 28.9%
- #18 Eclipse - 2nd Dawn for the Galaxy
84% matchMixed58% of 100 reviews2024
Dev: BrettspielWelt GmbHPub: Brettspielwelt GmbH
Windows · Mac
The galaxy, once peaceful after the Terran-Hegemony War, now faces rising tensions. The Galactic Council's efforts to maintain peace are failing as alliances shatter and secret treaties form. A confrontation looms—who will emerge victorious and rule the galaxy? Lead your people to victory!
Why similar: Strategy 100%
- #19 SOL: Exodus
85% matchMixed51% of 109 reviews2012
Dev: Bit Planet Games, LLC
Windows
Median: 30 minMean: 4.8 hrs≥1hr: 31%
Take on the role of the Lieutenant Commander, ace fighter pilot, as you search for a new home, battle a mysterious enemy, and rescue humanity from a fiery end.
Why similar: Indie 100%
- #20 Battlestar Galactica: Scattered Hopes
78% matchMostly Positive77% of 1,049 reviews2026
Dev: Alt ShiftPub: Dotemu
Windows
Median: 4.9 hrsMean: 10.5 hrs≥1hr: 81%
In Battlestar Galactica: Scattered Hopes, take command of a fleet escaping the annihilation of the Twelve Colonies. Manage crises on board as you prepare for the next encounter with the Cylon Fleet. Times are dire, and hard choices must be made. Your only hope: rejoin the Battlestar Galactica.
Why similar: Strategy 100%
- #21 Space Reign
77% matchMostly Positive74% of 461 reviews2026
Dev: Propulsive Games
Windows
An indie space-sim and strategy game featuring ship and fleet combat mixed with RTS elements. Complete contracts and Claim sectors for your faction in the near-future, where resource exploiting corporations are in a state of constant conflict over territory control.
Why similar: Strategy 68.9%, Indie 31.1%
- #22 MoonBase Commander
82% matchVery Positive90% of 182 reviews2014
Dev: Humongous EntertainmentPub: Rebellion
Windows
Median: 2.9 hrsMean: 4.7 hrs≥1hr: 94%
Explore. Strategize. Conquer.In the far future, Mankind has nearly exhausted all of earth’s natural resources. Fragile alliances between nations are tested to their limits as fierce wars ignite across land and space.MoonBase Commander puts you in charge of your own lunar territory in a quest to build the most powerful empire in space.
Why similar: Strategy 100%
- #23 Galactic Inheritors
83% matchMixed43% of 88 reviews2015
Dev: Crispon GamesPub: Plug In Digital
Windows
Median: 3.5 hrsMean: 3.6 hrs≥1hr: 97%
Colonise solar systems and watch them grow. Explore the galaxy to find its strategic choke points. Build up your empire and your fleet and then use the power of the media to prepare your people for the inevitable war. At the same time watch your opponents, keep on an eye on their own media and watch for threats and opportunities.
Why similar: Strategy 77.4%, Indie 22.6%
- #24 Project Tarvotan
82% matchMixed58% of 74 reviews2015
Dev: FlagmanJeremy
Windows · Mac
Median: 3.3 hrsMean: 5.5 hrs≥1hr: 84%
Project Tarvotan allows you to explore the depths of the Milky Way and local universe. Use your wit and resources at hand to plan out your path through each sector. Your demise lurks around every decision. Can you survive long enough and restore balance to the universe?
Why similar: Strategy 80.3%, Indie 19.7%
- #25 Terra Invicta
74% matchVery Positive80% of 9,823 reviews2026
Dev: Pavonis InteractivePub: Hooded Horse
Windows
Median: 9.2 hrsMean: 52.6 hrs≥1hr: 79%
An alien invasion has fractured humanity into seven ideological factions each with a unique vision for the future. Lead your chosen faction to take control of Earth’s nations, expand across the Solar System, and battle enemy fleets in tactical combat.
Why similar: Strategy 100%
- #26 Forbidden Planet
81% matchMixed52% of 361 reviews2016
Dev: Faton
Windows
Median: 3.5 hrsMean: 9.3 hrs≥1hr: 93%
"Forbidden Planet" is a Space Strategy and Tower Defence like Game. You control a small spaceship and your main goal is to protect your own home planet. Explore the universe for resources. Colonize other planets. Defend from the asteroids.
Why similar: Indie 75%, Strategy 25%
- #27 Earth 2160
81% matchMostly Positive73% of 1,563 reviews2006
Dev: Reality Pump StudiosPub: Topware Interactive
Windows · Mac · Linux
Median: 4.9 hrsMean: 9.8 hrs≥1hr: 93%
After the destruction of the EARTH in 2150, the leaders of the Eurasian Dynasty escaped on board an evacuation fleet. Now they are fighting for the survival of the human species. Their base is one large building comprising of smaller variable parts.
Why similar: Strategy 100%
- #28 Executive Assault 2
75% matchVery Positive83% of 1,764 reviews2023
Dev: Hesketh Studios Ltd
Windows · Mac
Median: 3.7 hrsMean: 8.2 hrs≥1hr: 76%
The RTS/FPS phenomenon has moved into space! Build your base on an asteroid, command fleets of starships for epic battles, pilot fighters, mine and trade resources, assemble robots to defend or assault other stations. Take sole command or share the glory as you fight for control of the quadrant.
Why similar: Strategy 100%
- #29 StarDrive
80% matchMixed45% of 1,489 reviews2013
Dev: Zero Sum Games
Windows
Median: 2.3 hrsMean: 6.7 hrs≥1hr: 88%
As a space bear, human or any other race, venture forth into the galaxy, create custom ships, conquer new worlds, build new colonies and defend your very existence against those who would take what is yours.
Why similar: Strategy 79.1%, Indie 20.9%
- #30 AI War: Fleet Command
78% matchVery Positive82% of 1,612 reviews2009
Dev: Arcen Games
Windows · Mac · Linux
Median: 2.7 hrsMean: 5.7 hrs≥1hr: 87%
"You are outgunned. You are massively outnumbered. You must win." These are your orders. Humanity has already fought its war against the machines -- and lost. AI death squads stand watch over every planet and every wormhole, the few remaining human settlements are held captive in orbiting bubbles, and the AIs have turned their...
Why similar: Strategy 91.8%, Indie 8.2%
- #31 Solaris
77% matchVery Positive80% of 90 reviews2021
Dev: SpacialCircumstances
Windows · Mac · Linux
Discover a space strategy game filled with conquest, betrayal and subterfuge. Build alliances, make enemies and fight your way to victory and galactic domination. Will you conquer the galaxy?
Why similar: Strategy 100%
- #32 Salvation Prophecy
79% matchMixed67% of 227 reviews2013
Dev: Firedance Games
Windows · Linux
Median: 54 minMean: 4.7 hrs≥1hr: 49%
Salvation Prophecy is a military space epic. Human, mutant, and robotic factions are at war for galactic domination. Battles rage as space fleets collide. Invaders clash against fortified enemy colonies. Yet the greatest danger is the impending annihilation foretold by an apocalyptic prophecy.
Why similar: Indie 100%
- #33 Planetary Annihilation: TITANS
75% matchVery Positive84% of 14,686 reviews2015
Dev: Planetary Annihilation Inc
Windows · Mac · Linux
Median: 4.0 hrsMean: 17.7 hrs≥1hr: 73%
Wage war across entire solar systems with massive armies at your command. Annihilate enemy forces with world-shattering TITAN-class units, and demolish planets with massive super weapons!
Why similar: Strategy 85.6%, Indie 14.4%
- #34 ZeroSpace
69% matchVery Positive81% of 1,297 reviews2026
Dev: Starlance Studios
Windows
Median: 2.7 hrsMean: 9.2 hrs≥1hr: 68%
ZeroSpace is a hybrid sci-fi RTS / RPG game that allows you to play as the commander of The Protectorate, a galactic force dedicated to securing humanity’s place in the galaxy. The Orion sector is locked in a vicious power struggle between many alien factions, ready to fight to the death.
Why similar: Strategy 100%
- #35 Into the Void
76% matchMixed63% of 136 reviews2015
Dev: Mozg Labs
Windows · Mac · Linux
Median: 5.5 hrsMean: 13.8 hrs≥1hr: 98%
Into the Void is a strategy RPG and exploration sci-fi game with an epic story and intense battles. Travel through space and discover the origin of a cosmic threat which destroyed Earth centuries ago. Fight or cooperate with the different factions; be a leader !
Why similar: Strategy 82%, Indie 18%
- #36 Battlevoid: Harbinger
74% matchMostly Positive79% of 1,061 reviews2016
Dev: Bugbyte Ltd.
Windows · Mac · Linux
Median: 1.8 hrsMean: 11.1 hrs≥1hr: 56%
Battlevoid: Harbinger is a hard sci-fi space exploration game blending roguelike, turn-based, star map strategy, and real-time space battles. You are a young commander venturing out into enemy territories, to unknown galaxies, never knowing what you will face as you jump out from hyperspace.
Why similar: Strategy 81.2%, Indie 18.8%
- #37 Ancient Space
76% matchMixed44% of 370 reviews2014
Dev: CreativeForge GamesPub: Paradox Interactive
Windows · Mac
Median: 4.4 hrsMean: 5.1 hrs≥1hr: 89%
Ancient Space is a story driven single player real time strategy game where you take command of a fleet embarking on a scientific mission to chart undiscovered reaches of space called ‘The Black Zone’. Overcome overwhelming odds and fight for your life and the survival of your ship and its crew.
Why similar: Strategy 95.5%, Indie 4.5%
- #38 The Pegasus Expedition
71% matchMixed63% of 390 reviews2023
Dev: Kalla GameworksPub: Fulqrum Publishing
Windows
Median: 3.7 hrsMean: 5.7 hrs≥1hr: 94%
The Pegasus Expedition is a story-driven sci-fi grand strategy game set in a key moment for humankind’s survival. Facing an overwhelming threat at home, humanity sends expeditions to the Pegasus Galaxy in a desperate attempt to find a refuge for the population of Earth.
Why similar: Strategy 100%
- #39 Lord of Rigel
70% matchMixed68% of 115 reviews2024
Dev: Rhombus Studios
Windows
Lord of Rigel is a turn-based 4X space strategy game inspired by the classics. In a galaxy divided by two elder races, will you unite with other species or forge your own path? Navigate galactic politics and defeat threats using espionage, research, and military force. How will you shape the galaxy?
Why similar: Strategy 100%
- #40 The Red Solstice
73% matchMostly Positive71% of 2,559 reviews2015
Dev: Ironward
Windows
Median: 3.2 hrsMean: 9.7 hrs≥1hr: 88%
2280 A.D. The last few survivors of a ruined Earth seek a new home: Mars, a planet whose inhabitants didn't take too kindly to outsiders. The Red Solstice is a tense, tactical, squad-based action game. Fight to survive with up to 8 players in co-op, or lead your own squad in single-player mode.
Why similar: Strategy 100%
- #41 Master of Orion 1
73% matchVery Positive90% of 453 reviews2016
Dev: SimTexPub: Wargaming Labs
Windows · Mac · Linux
Median: 6 minMean: 5.9 hrs≥1hr: 31%
Forge an empire in a universe where population growth is stripping away planetary resources. Colonize unknown planets and trade with other races for their knowledge.
Why similar: Strategy 100%
- #42 1000 days to escape
71% matchVery Positive84% of 405 reviews2019
Dev: Lemon Squeezy
Windows
Median: 2.0 hrsMean: 3.3 hrs≥1hr: 77%
Only 1000 days left until the end of the world. You have to realize the largest space program ever to save as many people as you can. Explore planets, colonize them, help people find a new home.
Why similar: Indie 100%
- #43 Interstellar Space: Genesis
71% matchVery Positive84% of 846 reviews2019
Dev: Praxis Games
Windows
Median: 1.7 hrsMean: 11.1 hrs≥1hr: 57%
Interstellar Space: Genesis is a turn-based space 4X strategy game in which you attempt to build a thriving galactic empire. Discover mysteries among the stars, colonize worlds, and engage enemies in tactical turn-based combat on your journey to becoming the ruler of the galaxy!
Why similar: Strategy 73%, Indie 27%
- #44 BlackChain
70% matchVery Positive86% of 123 reviews2021
Dev: Borington
Windows
A classic single-player RTS set in a Solar System ruled by megacorporations. Journey from Mars all the way to Planet 9 and uncover the secrets of the BlackChain.
Why similar: Strategy 87.1%, Indie 12.9%
- #45 Starcom: Nexus
69% matchVery Positive90% of 2,315 reviews2019
Dev: Wx3 Labs, LLC
Windows · Linux
Median: 3.8 hrsMean: 13.5 hrs≥1hr: 84%
Suddenly thrown into an unknown galaxy, you must explore, fight or befriend aliens and transform your ship from a small survey vessel into a powerful battlecruiser to unravel the mystery of the forces that brought you here and find your way home.
Why similar: Indie 100%
- #46 The Battle of Sol
73% matchMixed57% of 102 reviews2015
Dev: Bit Planet Games, LLC
Windows
Median: 18 minMean: 12.1 hrs≥1hr: 24%
The Battle of Sol is an intense space action game where you participate in epic capital ship battles, thrilling dogfights, space station raids, and much more as you liberate humanity's solar system from enemies determined to bring us to its fiery end.
Why similar: Indie 100%
- #47 Star Ruler
72% matchVery Positive82% of 341 reviews2010
Dev: Blind Mind Studios
Windows
Median: 30 minMean: 6.2 hrs≥1hr: 41%
Take command of a vast interstellar empire and safeguard your species from total extinction in a procedurally generated 3D galaxy (with the option to flatten it) from 1 System to 10,000+! Prove your species' ingenuity through a deep and intricate combat system where anything (from individual components on ships to the stars themselves)...
Why similar: Strategy 78.8%, Indie 21.2%
- #48 Annihilate The Spance
66% matchVery Positive90% of 362 reviews2025
Dev: Skyglow Softworks
Windows
An RTS base builder with huge battles, constant production, and autonomous ships. The Spance approaches, a vast and mysterious storm at the edge of humanity. Who shall claim its riches? Brave the perils of the depths in a story-rich singleplayer campaign with numerous distinct factions and bosses.
Why similar: Strategy 70.8%, Indie 29.2%
- #49 Deep Dark Forest
66% matchVery Positive87% of 52 reviews2025
Dev: pixiangames
Windows
You will have to lead the civilization, develop the economy, enhance the technology, stabilize the people and colonize new galaxies; when encountering unknown civilizations, will you hide yourself or communicate with them in a friendly way? In this "dark forest", every decision will be crucial.
Why similar: Strategy 100%
- #50 Nexus Legacy
64% matchMixed68% of 326 reviews2026
Dev: Nexus Legacy Team
Windows
Rebuild civilization from a single planet in Nexus Legacy, a persistent sci-fi 4X MMO. Colonize worlds, manage resources, research technologies, command fleets, forge alliances, and fight for control of a living galaxy.
Why similar: Strategy 100%
- #51 Interplanetary: Enhanced Edition
68% matchVery Positive85% of 936 reviews2017
Dev: Team Jolly RogerPub: Black Smoke Studios
Windows · Mac · Linux
Median: 4.4 hrsMean: 5.5 hrs≥1hr: 90%
In this turn-based strategic artillery game, players wage interplanetary wars by developing their home planets and firing massive barrages through the unpredictable gravity fields of the solar system.
Why similar: Strategy 78.3%, Indie 21.7%
- #52 Creeper World IXE
64% matchMixed70% of 884 reviews2024
Dev: Knuckle Cracker
Windows
Median: 13.7 hrsMean: 14.8 hrs≥1hr: 86%
The unstoppable alien force known as The Creeper has returned, devouring thousands of worlds in its path, and yours is next. Battle against the Creeper fluid in a groundbreaking pixel-level simulation to prove that humanity will rule the galaxy forever!
Why similar: Strategy 100%
- #53 reconquest
70% matchMixed55% of 263 reviews2016
Dev: StormCube Games
Windows · Mac
Reconquest is a real-time strategy base building game. After World War III, mankind got close to extinction. You have to reconquer Earth by making better strategic decisions than your opponents.
Why similar: Strategy 100%
- #54 Aven Colony
67% matchMostly Positive72% of 2,779 reviews2017
Dev: Mothership Entertainment LLCPub: Team17 Digital Ltd
Windows
Median: 4.2 hrsMean: 8.1 hrs≥1hr: 90%
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.
Why similar: Strategy 85.6%, Indie 14.4%
- #55 Maia
68% matchMixed44% of 1,064 reviews2018
Dev: Simon RothPub: Machine Studios
Windows · Mac · Linux
Median: 30 minMean: 4.4 hrs≥1hr: 41%
Maia is a colony building game set in the not-so-distant future. Your colonists make planetfall on a hostile world and you must ensure their survival and their safety, constructing their off-world habitat from almost nothing and sheltering them from a dangerous, often deadly environment.
Why similar: Strategy 74.9%, Indie 25.1%
- #56 Solar Nations 2
61% matchVery Positive85% of 595 reviews2025
Dev: Flomgus Games
Windows
In this Grand Strategy game, you take control of the Solar System's Great Powers in 2092 and weather the storm of change as you navigate the uncertain waters of the future. Control the greatest military forces in the world and wage wars on an epic scale: outer space is yours to conquer!
Why similar: Strategy 100%