Best Sci-fi Games on Steam
Unlike generic lists, our strategy game recommendations use a rigorous analysis of Steam user reviews to identify and feature only the best, community-validated sci-fi games. For those who prefer not to search, check out lists of the most played, top deals and best free to play Sci-fi games on Steam.
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A New Beginning - Final Cut
A New Beginning is a cinematic adventure-thriller done graphic novel-style.
Primordia
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.
PlanetSide 2
PlanetSide 2 is an all-out planetary war, where thousands of players battle as one across enormous continents. Utilize infantry, ground and air vehicles, and teamwork to destroy your enemies in this revolutionary first-person shooter on a massive scale.
Sonic Adventure 2
Experience two unique adventures featuring both long-time heroes and new and returning villains as they battle for the fate of the world!
Call of Duty®: Black Ops II
Pushing the boundaries of what fans have come to expect from the record-setting entertainment franchise, Call of Duty®: Black Ops II propels players into a near future Cold War
Thomas Was Alone
Guide a group of rectangles through 120 levels, using their different skills together to overcome a series of obstacles in each environment. Discover the human-made story of the first sentient artificial intelligences with Danny Wallace’s BAFTA-winning narration.
Chaos on Deponia
With this long-expected sequel to the critically highly acclaimed and lavishly praised Deponia, the player enters round two. Chaos on Deponia turns out to be even wackier than its predecessor and instantly puts the player under its spell.
Cargo Commander
Alone in space, light years away from your family, armed with only your Fistcannon™; you are Cargo Corps' latest recruit, a Cargo Commander.
Natural Selection 2
A fast paced multiplayer shooter that pits aliens against humans in a strategic and action-packed struggle for survival!
Primal Carnage
A savage online shooter, where players do battle as man or beast in class-based deathmatches and a frantic escape mode. Unleash your inner dinosaur!
DOOM 3
A demonic invasion has overwhelmed the Union Aerospace Corporation's Mars research facility. As one of only a few survivors, you must fight your way to hell and back against a horde of demons in this award-winning horror/action FPS and reimagining of the original DOOM.
XCOM: Enemy Unknown
The XCOM: Enemy Unknown - Slingshot Pack is Now Available!
Cortex Command
Choose between different factions, with their own set of expendable soldiers, mechas, and weapons. Protect your brain, mine gold, and destroy the enemy cortex in his bunker complex!
ETHER VAPOR Remaster
Ether Vapor Remaster is a cinematic 3D arcade shooter and visual treat from developer Edelweiss.
Planets Under Attack
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.
Borderlands 2
The Ultimate Vault Hunter’s Upgrade lets you get the most out of the Borderlands 2 experience.
FTL: Faster Than Light
This "spaceship simulation roguelike-like" allows you to take your ship and crew on an adventure through a randomly generated galaxy filled with glory and bitter defeat.
Intrusion 2
"This is some of the most fun I've had with a game so far this year, and it will go down as one of the best side-scrolling shooters of all time." - 9/10, Destructoid
STAR WARS™ Knights of the Old Republic™ II - The Sith Lords™
5 years after the events of the award winning original, the Sith are on the verge of crushing the Old Republic. As a lone Jedi, will you follow the light side or succumb to the dark?
Galaxy on Fire 2™ Full HD
A hyperdrive malfunction sends Keith T. Maxwell tumbling through space and time to fight for his life against a mysterious alien armada that is wreaking havoc.
Iron Brigade
Join The Mobile Trench Brigade and protect humanity from the evil Monovision menace!
Awesomenauts
Use your power, show your might! Play this Multiplayer Online Battle Arena (MOBA) game! AWESOMENAUTS combines 2D platforming with team-based strategy and hero based action. Whether you are a new recruit or an intergalactic legend, play AWESOMENAUTS!
Prototype 2
Become the ultimate shape-shifting weapon!