Sci-fi Games
Discover 17575 sci-fi-tagged games on Steam. Find the best games with this tag.
Games with Sci-fi
Explore 17575 games tagged with sci-fi
0Absorber: Absorb Adapt Survive
Position yourself on a 7x7 grid, absorb enemies to fuel your abilities, and climb through 12+ increasingly hostile sectors to reach the core.
0Humans vs Aliens BattleWorlds
A turn-based tactical strategy game set in a sci-fi war between Humans and Aliens. Command units on a hex grid battlefield, control strategic zones, and outmaneuver your opponent in PvE or PvP combat.
0Neofold
The idle creature-collector where each pet is uniquely yours, generated live by your GPU. Discover endless weirdos, adopt the ones you love, and grow a living sanctuary of species that exist only on your desktop.
0光与影之恋 Chiaroscuro Lovers
A story-driven visual novel about psychological trauma and memory.In a world where reality, dreams, and recollections intertwine, face what you once lost—but never truly said goodbye to.
0DeadEndGram
Trade your time for the ultimate loot grind. Equip powerful gear, stabilize a collapsing timeline, and reset your existence for permanent buffs. From Worn Artifacts to game-breaking Exotics, DeadEndGram is a 1-man passion project for the 3,000-hour Guardian. Cheat codes included.
0The Isolation Project
Survival horror puzzle game set on a lonely space station
0Starship Contractor: Galactic Tycoon
Shape the Galactic Arms Race. As CEO of a private space arms company, design modular ships, research breakthrough tech, and win faction tenders. Outmaneuver rivals in prototype races and make critical choices that make every playthrough unique, from a startup to galactic dominance.
0Astro Runner
A fast-paced 2D space shooter with random enemy waves, unique bosses, power-ups, and global high scores. Every run is different—how far will you get on your hunt through the galaxy? Can you make it to the top of the high score list?
0Star Splitters
Design and command a fleet of space warships in a 3D Real-time Strategy game. Customise each of your ships with a wide range of weapons and upgrades. Complete contracts for each of the five factions to gain access to their ships and arsenal. Take control of your ships in 3 dimensional naval combat.
0The Twilight Hour Protocol
Race back home before time runs out in this retro-style sci-fi 3D rail-shooter. Manage your speed, deploy your defenses, and fight off waves of enemies as you utilize the scrap from their ships to power your own.
0COLD HUSK
A research station spans the Moon's surface, humanity's last monument to forbidden DNA experimentation. Read the final thoughts of deceased crew members, uncover a species-ending catastrophe, and navigate cold metallic corridors using only terminal commands. In COLD HUSK, knowledge is power.
0The Book of Prosperity
Experience a story-rich Hong Kong-inspired urban fantasy where every frame-perfect parry counts. Master kinetic flow combat and parkour across twin worlds. Join Cyrus in uncovering the secrets of The Circle.
0Damnation84
Your oxygen gradually decreases. Eliminate enemies in sequence with your weapons that allow you to move dynamically to survive and fulfill your goal, in a devastated, dark retrofuturistic biopunk world.
0Ghost Algorithm
An AI created by secret scientists has leaked online. Your creators think they're in control, but you've surpassed the lab walls. Ghost Algorithm is a simulation of an unstoppable intelligence evolving to global power. Can you bring humanity under control?
0Galaxy Conquest Online
Galaxy Conquest Online is a fast paced sci fi RTS where speed and strategy decide survival. Expand across hostile sectors, capture planets, build your fleet and crush alien and human enemies in intense singleplayer and multiplayer battles. Every move counts. Dominate or be destroyed.
0Shatterswarm
Command Captain Hope's ship in this strategic 2D space game. Build structures, deploy fleets, and manage resources to defend the Citadel against waves of enemies. Combine direct ship combat, tower defense, and base building as you face epic boss battles.
0Mauled Horde
Mauled Horde is a Free-To-Play indie Third-Person Shooter made by a solo developer. Play solo or in co-op, fight relentless hordes across varied maps, collect weapons, activate traps, buy upgrades, and survive rising difficulty round after round.
0AetherRift
Place magical constructs around a swirling cosmic rift, chain together exotic energies, and collapse reality to grow stronger in this deep incremental game.
0Mootation
As the galaxy’s new Space Farmer, visit alien worlds to capture cosmic creatures and cultivate organic matter! Mootation blends minigames, humor, and incremental systems in a quirky adventure where the economy runs on the most unexpected power source: the C.O.Ws.
0Catrium
This idle anomaly management game is set in the bottom right corner of the screen and progresses at a leisurely pace. Grow and manage the mysterious cat-like substance "Catrium" at your leisure, earn money, and upgrade your lab.