Best Sci-fi Games on Steam
Games about future tech, space, aliens, science, or speculative worlds.
Browse all Sci-fi →
1Among Us
- Players say: Crewmates race to finish spaceship tasks while hidden Impostors sabotage the ship, kill in secret, and evade votes. Players like: Friend-Group Fun · Bluffing and Deduction · Easy to Learn
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An online and local party game of teamwork and betrayal for 4-15 players...in space!
Nov 16, 2018
In this game, you can…
- crawl through vents and pop out somewhere unexpected.
- kill someone, then report the body yourself and lead the investigation away from you.
- get killed or voted out and still keep doing tasks to help your team win from beyond the grave.
- find a body, report it, and instantly drag everyone into a meeting to reconstruct who was where.
- lock doors to trap someone in a room, cut off their escape, and kill them in private.
- trigger an oxygen or reactor emergency that forces everyone to sprint to fixes while you pick off someone separated from the group.
- pretend to do tasks while everyone watches the task bar for proof you're actually helping.
- watch security cameras or the admin map to spot suspicious movement without being in the room.
2Portal 2
- Players say: As an Aperture Science test subject, solve physics puzzles with portals and new tools, or tackle a separate campaign in co-op. Players like: Clever Portal Puzzles · Sharp Character Humor · Separate Co-op Campaign
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The "Perpetual Testing Initiative" has been expanded to allow you to design co-op puzzles for you and your friends!
Apr 18, 2011
In this game, you can…
- hit a chapter title that literally says "this is the part where he kills you" as the game turns it into a set-piece
- bounce across chambers with repulsion gel, build insane speed with propulsion gel, then paint walls to make new portal surfaces
- play co-op where each robot has its own portal gun, and your solution can break the bridge your partner is standing on
- wake up from long-term stasis, get guided by a friendly AI, and then have the main villain come back online
- use portals to redirect lasers, light bridges, and tractor beams through moving machinery to power your way forward
- chain portals to fling yourself over pits, launch cubes onto buttons, and keep extending the same trick into bigger gaps
- replay co-op stages for least time and least portals, racing friends as they knock you off the leaderboard
- drop into community-made test chambers and keep getting brand-new puzzles long after the story ends
3R.E.P.O.
- Players say: As a robot crew in haunted ruins, haul fragile valuables past monsters and extract enough loot to fund upgrades. Players like: Co-op Laughs · Chaotic Physics · Horror Atmosphere
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An online co-op horror game with up to 6 players. Locate valuable, fully physics-based objects and handle them with care as you retrieve and extract to satisfy your creator's desires.
Feb 26, 2025
In this game, you can…
- get dumped into a boxing arena when the mission fails and beat your friends to crown a winner.
- run over a teammate with the cart, pick up their body, and use it to kill a monster.
- watch a monster sprint up, snatch a 20k statue you can barely lift, and hurl it back hard enough to wipe the team.
- revive teammates mid-round by cashing out their head, or dragging them back to the truck for a revive.
- haul fragile, fully physics-based treasure like pianos and antique vases that can smash, drop, or lose value on the way out.
- pick up crouching teammates, throw them onto shelves, and turn their bodies into weapons or hazards.
- sneak past monsters while dragging sofa-sized loot, then get yanked down a hallway by a ghost as someone drops into an elevator shaft.
- hide under furniture and whisper in proximity voice chat while monsters search, with the dead and living stuck in separate comms.
4Deep Rock Galactic
- Players say: Lead a team of space dwarves through shifting alien caves, mining resources, fighting bug swarms, and escaping together. Players like: Co-op Teamwork · Procedural Cave Runs · Class And Weapon Builds
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Deep Rock Galactic is a 1-4 player co-op FPS featuring dwarven space miners, procedurally-generated destructible environments, and endless hordes of alien monsters. Explore cave systems, mine for minerals, and work together to survive!
May 13, 2020
In this game, you can…
- drink a round that rockets the whole team forward, then slam into each other and the station while shouting and tossing mugs.
- freeze enemies solid, drill them to pieces, and heal off them while they can't move or fight back.
- hit the drop pod with seconds left, spot a teammate down far away, and turn the escape into a full rescue run mid-extraction.
- turn a pre-mission lobby into a hangout with beer, dancing, minigames, and physical goofing around instead of menus.
- grapple to impossible-to-reach minerals, then have a teammate shoot a platform under you so you can mine safely and get out.
- finish the objective, call extraction, then carve a brand-new tunnel straight to the drop pod while bugs race you through it.
- fight off swarms in caves that aren't preset arenas, so every defense turns into a new improvisation based on cliffs, tunnels, and open voids.
- bring a solo drone that mines, lights caves, carries minerals, digs paths, and can revive you so you can still finish missions alone.
5Subnautica
- Players say: Stranded on an alien ocean, gather, craft and build your way into deeper waters while managing survival and avoiding predators. Players like: Immersive Ocean Exploration · Tense Sound And Atmosphere · Beautiful Underwater World
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Descend into the depths of an alien underwater world filled with wonder and peril. Craft equipment, pilot submarines and out-smart wildlife to explore lush coral reefs, volcanoes, cave systems, and more - all while trying to survive.
Jan 23, 2018
In this game, you can…
- throw a fish to distract a predator, then have it come back carrying scrap metal for you.
- pilot a giant submarine you can live in, including growing food onboard for long expeditions.
- take a mech suit into extreme depths and outfit it with a drill and grappling hook to mine and swing around.
- crash onto an alien ocean world and start with only a lifepod.
- keep pushing deeper until the surface stops feeling reachable.
- get trapped in twisting underwater caves where there's no straight swim back up.
- scan wrecks and fragments to unlock new tools and vehicles, turning scavenging into a tech tree you build yourself.
- leave a crashed spaceship because you lack the tools, then return later with new gear to open more of it up.
- build modular underwater bases that store vehicles, generate power, and start leaking if the pressure gets too high.
6Lethal Company
- Players say: As Company crew, scavenge scrap from dangerous abandoned moons, survive their creatures, and meet quotas with friends. Players like: Funny Co-op Moments · Horror-Comedy Balance · Varied Creature Encounters
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A co-op horror about scavenging at abandoned moons to sell scrap to the Company.
Oct 23, 2023
In this game, you can…
- sell every last scrap, then haul a teammate's body to the counter for the final few credits to hit quota.
- stay on the ship as mission control, use the terminal to open doors and spot threats, and talk your team back alive through the maze.
- listen to your friend's voice get muffled and cut off mid-sentence as a monster grabs them in proximity chat.
- hear a teammate dying over the radio while you keep scavenging, and the person guiding you keeps talking after they're already dead.
- open a trapped teleporter room, watch one rescue turn into a chain of monster attacks, and still have to find a way out.
- step into a mineshaft because your friends told you to, then they later find you cocooned and hanging from the ceiling.
- watch a teammate calmly warn you about a landmine, then immediately scream about a spider and get blown up mid-run.
- buy gear like jetpacks, ladders, and stun grenades, then accidentally turn them into hazards that kill your own crew.
7Borderlands 2
- Players say: Choose a Vault Hunter, battle across Pandora, and chase ever-changing guns while pursuing Handsome Jack solo or in co-op. Players like: Memorable Story and Villain · Varied Guns and Loot · Distinct Vault Hunters
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The Ultimate Vault Hunter’s Upgrade lets you get the most out of the Borderlands 2 experience.
Sep 17, 2012
In this game, you can…
- dual-wield any two guns, including two rocket launchers at once.
- loot a gun with hidden red-text behavior that shoots explosive swords instead of bullets.
- run a secret quest where you toss a ring into lava, then three birds fly in and drop loot chests.
- get downed, then save yourself by killing an enemy to stand back up.
- build characters into totally different roles, like a turret-dropping soldier, a crowd-lifting siren, or an invisible melee assassin.
- spend 50 golden keys in a row, grab a new weapon, then immediately jump back into a hard fight to see if it flips the outcome.
- replay the whole campaign in escalating modes where enemies get nastier and your build and weapons have to keep evolving.
- smash through enemies in an off-road vehicle while crossing huge hostile zones on Pandora.
- farm bosses and chests for randomized drops until you finally hit a perfect weapon-part roll
8Titanfall® 2
- Players say: As a stranded Militia rifleman, fight through a sci-fi war with a veteran Titan, combining wall-running gunplay and mech combat. Players like: Fluid Pilot Movement · Memorable Campaign · Creative Level Design
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Respawn Entertainment gives you the most advanced titan technology in its new, single player campaign & multiplayer experience. Combine & conquer with new titans & pilots, deadlier weapons, & customization and progression systems that help you and your titan flow as one unstoppable killing force.
Jun 18, 2020
In this game, you can…
- swap between two timelines mid-fight to flank enemies and solve traversal puzzles in the same room.
- call down your titan from orbit, climb in, and switch from parkour gunfights to towering mech brawls.
- get chased on foot by a titan, then use movement, cloaking, and anti-mech weapons to slip away at the last second.
- dropkick an enemy, cloak, then wallrun over a gap to pick off a sniper before anyone tracks you.
- chain wallruns, slides, double jumps, and mantles fast enough that traversal becomes your main way to win fights.
- start a match as a pilot, then watch the battlefield shift when titans arrive and fights turn into mech duels across the map.
- fight named boss titans in full mech showdowns where the duel is the whole encounter, not just a bigger enemy.
- play a four-player co-op mode where you defend a harvester against waves of enemies and giant mech bots.
9Half-Life 2
- Players say: As Gordon Freeman, fight the Combine across occupied Earth using firearms, environmental physics, and improvised weapons. Players like: Gravity Gun Physics · City 17 Atmosphere · Varied Level Design
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Reawakened from stasis in the occupied metropolis of City 17, Gordon Freeman is joined by Alyx Vance as he leads a desperate human resistance. Experience the landmark first-person shooter packed with immersive world-building, boundary-pushing physics, and exhilarating combat.
Nov 16, 2004
In this game, you can…
- use a gravity gun to turn junk into weapons, tools, and stepping stones mid-fight.
- launch a saw blade and slice an enemy clean in half.
- pick up a random can, throw it at a guard, and watch him chase you down.
- carry one specific object for ages because the world stays physically consistent.
- drive a buggy across huge stretches of coast and ruins while the same looming tower stays in sight.
- storm a fortified prison complex as a full-scale set-piece assault.
- walk into a chapter the game treats like horror, with zombies howling and shadows jumping rooftop to rooftop.
- solve small puzzles by moving real objects through water, fire, and weight, instead of hitting switches.
10Satisfactory
- Players say: As a FICSIT employee on an alien world, explore for resources and build first-person factories that automate production. Players like: Factory Optimization · Rebuilding Production Lines · Conveyor-Belt Networks
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Satisfactory is a first-person open-world factory building game with a dash of exploration and combat. Play alone or with friends, explore an alien planet, create multi-story factories, and enter conveyor belt heaven!
Sep 10, 2024
In this game, you can…
- walk in one direction for 30 minutes and realize it's all one connected 30 km² world.
- build a 4 km pipeline just to bring crude oil back to base.
- power an acre-long production line with nuclear energy, then use the leftovers to build a racetrack in the desert.
- turn a pristine alien landscape into a sprawling logistics megafactory.
- go from hand-mining ore to running powered drills, vehicles, jetpacks, and trains in the same save.
- string conveyor belts across cliffs and valleys until the terrain is basically your factory's floor plan.
- expand from hand-crafting parts to fully automated production lines that keep making them while you do something else.
