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4.0
"I have many things to tell you and very little time… I come from a universe parallel to yours. My world is desperately in need of your help. Only YOU can save us."Responding to the desperate pleas of a mysterious character from another dimension, your soul must enter the dark and futuristic city of Omikron.
Windows · Single-player
RPGSci-fiCyberpunkGreat SoundtrackFuturistic
5.5
The year is 1962 and the Cold War has the nation gripped by fear.  A top-secret government unit called The Bureau begins investigating a series of mysterious attacks by an enemy more powerful than communism.
| | | | Windows · Mac · Single-player · Steam Achievements · Full controller support · Steam Trading Cards · Steam Cloud · Remote Play on TV
ActionSci-fiTacticalThird-Person ShooterSingleplayer
2.5
Etherium is a real-time strategy game set in a science-fiction universe, where three factions battle it out for a mysterious and rare resource known as ‘Etherium’.
| | | Windows · Single-player · Multi-player · PvP · Online PvP · Steam Achievements · Steam Trading Cards · Steam Cloud · Steam Leaderboards
Sci-fiStrategyRTSMultiplayerSpace
5.0
State of Mind is a futuristic thriller game delving into transhumanism. The game explores themes of separation, disjuncture and reunification, in a world that is torn between a dystopian material reality and a utopian virtual future.
| | | | | Windows · Mac · Linux · Single-player · Steam Achievements · Full controller support · Steam Trading Cards · Steam Cloud · Remote Play on TV
Sci-fiStory RichAdventureFuturisticSingleplayer
8.8
As Commander Shepard, you lead an elite squad on a heroic, action-packed adventure throughout the galaxy. Discover the imminent danger from an ancient threat and battle the traitorous Saren and his deadly army to save civilization. The fate of all life depends on your actions!
Mass EffectHIGHLY RATED
Windows · Single-player
RPGSci-fiStory RichActionThird-Person Shooter
7.8
What if someone knew your mind better than you did? The Swapper is an award-winning, narrative driven puzzle game set in the furthest reaches of space.
The SwapperHIGHLY RATED
| | | | | Windows · Mac · Linux · Single-player · Steam Achievements · Full controller support · Steam Trading Cards · Remote Play on TV
PuzzleSci-fiAtmosphericIndieSpace
3.4
In the distant future, the X universe faces a period of profound and irrevocable change. While the universe stumbles towards an uncertain future, countless adventures await as new enemies rise in search of power.
| | | | | | Windows · Mac · Linux · Single-player · Steam Achievements · Full controller support · Steam Trading Cards · Captions available · Steam Workshop · Steam Cloud
SimulationSpaceSci-fiActionSpace Sim
6.7
A ground-based RTS prequel to the classic Homeworld games. Assemble your fleet and lead them to victory on the shifting sands of Kharak in this compelling strategy game for PC from Blackbird Interactive.
| | | | Windows · Mac · Single-player · Multi-player · Steam Achievements · Steam Trading Cards · Steam Cloud · Stats · Steam Leaderboards
StrategyRTSSci-fiMultiplayerStory Rich
5.3
Fight for control of a frontier world. Gather resources, build your base, and command your forces in battle. Survive long enough to unleash your ultimate weapon - THE EPIC.
| | | | Windows · Single-player · Multi-player · Steam Achievements · Steam Trading Cards · Steam Workshop · Steam Cloud · Valve Anti-Cheat enabled · Stats · Steam Leaderboards · Includes level editor
StrategyRTSSci-fiMultiplayerAliens
5.5
Shadowgrounds breathes fresh air into the action genre with explosive combat sequences, an innovative weapon upgrade system, and an intriguing storyline. The adrenaline-pumping, top-down gameplay and audiovisual fireworks set the scene for this new action experience which also includes single computer (split keyboard or joystick) co-op...
| | Windows · Mac · Single-player · Multi-player · Shared/Split Screen · Steam Trading Cards · Remote Play Together
ActionSci-fiTop-Down ShooterShooterLocal Co-Op
3.3
Syndrome, a sci-fi survival horror game that places you in a living hell inside a doomed starship. Find out what happened to your lost crew. Run. Hide. Fight. Survive.
| | | | Windows · Mac · Single-player · Steam Achievements · Full controller support · Steam Trading Cards · Captions available · Remote Play on TV
Sci-fiSurvival HorrorHorrorAdventureFirst-Person
6.9
Take the role of ARID, the artificial intelligence within a high-tech combat suit. The Fall is a unique combination of adventure-game puzzle solving and side-scroller action, all set within a dark and atmospheric story. Get ready for a disturbing journey as you explore the world of The Fall.
| | | | | Windows · Mac · Linux · Single-player · Steam Achievements · Full controller support · Steam Trading Cards · Steam Cloud · Remote Play on TV
AdventureSci-fiIndieAtmosphericAction
6.4
Set in futuristic Tokyo, take control of the robotic community before they control everything!
| | | Windows · Single-player · Multi-player · Co-op · Steam Achievements · Full controller support · Steam Cloud · Steam Leaderboards · Remote Play on TV
ActionThird-Person ShooterSci-fiRobotsCyberpunk
5.3
STASIS The isometric, point-and-click, sci-fi horror adventure game! In the distant future aboard a seemingly abandoned spacecraft, John Maracheck awakes from stasis. He must push himself to new physical and emotional limits and unravel the mysteries around him.
| | | Windows · Mac · Single-player · Steam Achievements · Steam Trading Cards · Captions available
AdventureHorrorPoint & ClickSci-fiIsometric
6.5
Halo: Spartan Assault brings the excitement of Halo combat to Steam for the very first time. Battle your way through 30 action-packed missions against the Covenant as you explore the origin of the Spartan Ops program featured in Halo 4. *DirectX feature level 10 required.
| | | Windows · Single-player · Steam Achievements · Steam Trading Cards · Partial Controller Support · Steam Cloud · Steam Leaderboards
ActionTop-Down ShooterSci-fiSingleplayerTop-Down
7.2
PlatinumGames’ revolutionary sci-fi action shooter slide-boosts onto PC. Battle legions of future-tech enemies using a vast arsenal of weapons, including all DLC. Fully unlocked framerate and gorgeous HD resolutions up to 4K. The definitive way to play: war has accelerated.
| | | Windows · Single-player · Steam Achievements · Full controller support · Steam Trading Cards · Steam Cloud · Remote Play on TV
ActionThird-Person ShooterSci-fiSingleplayerFast-Paced
8.8
Recruit. Explore. Control.Two years after Commander Shepard repelled invading Reapers bent on the destruction of organic life, a mysterious new enemy has emerged. On the fringes of known space, something is silently abducting entire human colonies.
Mass Effect 2HIGHLY RATED
Windows · Single-player
RPGSci-fiStory RichThird-Person ShooterAction
5.7
In 2097, life is discovered on Mars. When your mission of first contact becomes trapped by a cave-in, you must master the alien ecosystem to survive. Soon you stumble upon more than anyone expected, and with time running out, you will make a decision that determines the fate of a lost planet.
| | | | Windows · Mac · Linux · Single-player · Steam Achievements · Full controller support · Steam Cloud
Sci-fiAdventureIndieExplorationPlatformer
2.3
Take on the role of Nora Harwood, member of Everreach’s Security Division, on a mission to secure the colonization process of Eden and investigate mysterious incidents! Everreach: Project Eden is a fast-paced, story-driven action-RPG set on the visually stunning Planet Eden.
| | | Windows · Single-player · Steam Achievements · Full controller support · Steam Trading Cards · Steam Cloud
RPGActionIndieSci-fiFemale Protagonist
5.2
Let's spend the next three real-time days together uncovering the mystery of what went horribly wrong on a derelict generation ship, with the help of a spunky/more-than-slightly-traumatized AI sidekick! A sequel to Analogue: A Hate Story that tells a whole new hate story of its own.
| | | Windows · Mac · Linux · Single-player · Steam Achievements · Steam Cloud
Visual NovelIndieAnimeSci-fiStory Rich
2.2
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.
| | | Windows · Mac · Single-player · Steam Achievements · Steam Trading Cards · Steam Cloud
StrategySpaceRTSSci-fiSingleplayer
7.4
Life has ceased. Man is but a myth. And now, even the machines have begun to fail. Lead Horatio Nullbuilt and his sarcastic sidekick Crispin on a journey through the crumbling world of Primordia, facing malfunctioning robots, ancient secrets, and an implacable, power-hungry foe.
| | Windows · Single-player · Steam Achievements · Steam Trading Cards
Point & ClickAdventurePost-apocalypticSci-fiIndie
4.1
Approximately 20 years after the events depicted in Deus Ex, The World is only beginning to recover from a Catastrophic worldwide depression. In the Chaotic period of recovery, several religious and political factions see an opportunity to re-shape a worldwide government to their agendas, understanding that the right moves now could...
Windows · Single-player
CyberpunkActionFPSRPGSci-fi
4.8
A murder mystery, on a plane, in the future. You are Consortium Bishop Six, a global peacekeeper in the year 2042. Play an active role in the ongoing narrative. Every choice counts.
| | | Windows · Single-player · Steam Achievements · Steam Trading Cards · Steam Cloud · Steam Leaderboards
RPGSci-fiAdventureIndieAction
6.2
Pilot drones into derelict spaceships to find the means to survive and piece together how the universe became a giant graveyard.
| | Windows · Mac · Linux · Single-player
StrategySci-fiIndieSpaceHorror
8.3
You are Isaac Clarke, an engineer on the spacecraft USG Ishimura. You're not a warrior. You're not a soldier. You are, however, the last line of defense for the remaining living crew.
Dead SpaceHIGHLY RATED
| Windows · Single-player · Full controller support · Remote Play on TV
HorrorActionSci-fiSpaceThird Person
In a world dominated by machines, mankind has lost hope for the future. You are a machine hunter. Your task is to recover and use the lost technology to save the human race. Track, hunt and build shelter in this extremely hostile world.
Mech HunterCOMING SOON
Windows · Single-player
FPSActionSci-fiAdventureFirst-Person
8.2
The last days of man are at hand.. Two years after the Infinite War the once great warring nations now lie in ruins, and humanity’s hope for a brighter future is nothing but a bitter memory. A new, seemingly unstoppable enemy, supported by the zealots of The Order, now seeks to eradicate mankind: UEF, Aeon Loyalist, and Cybran alike.
Windows · Single-player · Multi-player
StrategyRTSSci-fiMultiplayerSingleplayer
7.7
Experience the epic space strategy games that redefined the RTS genre. Control your fleet and build an armada across more than 30 single-player missions. Choose unit types, fleet formations and flight tactics for each strategic situation.
| | Windows · Single-player · Multi-player · Steam Achievements · Steam Workshop · Steam Cloud
SpaceStrategyRTSSci-fiClassic

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Gordian Quest on Steam