Best Aliens Games on Steam
Games featuring extraterrestrial life, invasions, first contact, or strange worlds.
Browse all Aliens →
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.
2Subnautica
- 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.
3Lethal 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.
4Half-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.
5Halo: The Master Chief Collection
- Players say: Play six sci-fi Halo campaigns as Master Chief and other soldiers, then battle across multiplayer maps or build in Forge. Players like: Campaign Stories · Six-Game Collection · Nostalgic Classics
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The Master Chief’s iconic journey includes six games, built for PC and collected in a single integrated experience. Whether you’re a long-time fan or meeting Spartan 117 for the first time, The Master Chief Collection is the definitive Halo gaming experience.
Dec 3, 2019
In this game, you can…
- swap between the 2001 and anniversary visuals instantly, mid-mission, while everything else keeps playing normally
- get blindsided when a straight sci-fi shooter mission suddenly turns into claustrophobic survival horror
- build custom maps and modes, then jump into weird community-made games people invented in the browser
- storm a beach, then spill into a huge open battlefield where you choose the route, vehicles, and targets for the assault
- dual-wield guns and turn a normal firefight into a two-weapon rushdown
- play the entire campaign in 4-player co-op as your own spartans, start to finish, with everyone in the same missions
- remix the whole campaign with skulls that change how combat works, turning familiar levels into totally different challenge runs
- fight 16-player multiplayer battles with tanks, aircraft, and alien weapons all on the same map
6Black Mesa
- Players say: A physicist fights through a research facility and alien world, using firearms, movement, and environmental puzzles to survive a catastrophe. Players like: Immersive Atmosphere · Expanded Xen Levels · Updated Visuals
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Relive Half-Life.
Mar 6, 2020
In this game, you can…
- spend roughly a quarter of the campaign in a rebuilt Xen that plays like its own ecosystem, with new creatures and reimagined spaces.
- get hunted for a long stretch by a giant alien behemoth, then finally turn and fight it when there's nowhere left to run.
- trigger an experiment that rips open reality and starts an alien invasion, all while you stay in control and the story never cuts away.
- step through a teleporter into Xen and emerge in a vast, fully alien border-world with huge new areas to explore.
- survive firefights where enemy soldiers flank, use cover, and throw grenades aggressively, forcing you to keep moving and switch tactics.
- walk into a smoking battlefield where humans and aliens are actively fighting across wreckage, and you can get caught in the crossfire.
- solve physics-based obstacles by moving and stacking objects to reach switches, routes, and safety.
- pick up new iconic gear and watch it snap into place in your hands with full first-person animations.
7Subnautica: Below Zero
- Players say: Investigate your sister’s fate on an arctic alien ocean, gathering resources, crafting gear, and exploring by sea and land. Players like: Vivid Alien Biomes · Expanded Base Building · Seatruck Modules
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Dive into a freezing underwater adventure on an alien planet. Below Zero is set two years after the original Subnautica. Return to Planet 4546B to uncover the truth behind a deadly cover-up. Survive by building habitats, crafting tools, & diving deeper into the world of Subnautica.
May 13, 2021
In this game, you can…
- swim straight through a gigantic fish creature that's basically a living tunnel.
- pick up and carry penguin babies around.
- use a spy penguin robot to slip into tight spaces and bring back resources.
- crash-land on an alien planet again and rebuild your entire survival setup from almost nothing.
- treat body heat like oxygen, warming up with hot drinks, gear, and heat plants to cross frozen regions.
- ride a modular truck-sub you can extend with extra rooms and haul a jukebox inside.
- play your own music in your base or while driving around in your vehicle.
- push deeper through crystal caves and layered underwater shafts to uncover alien tech and hidden artifacts.
- trigger bubbling purple vents that can explode if you get too close while you're exploring.
8Half-Life: Alyx
- Players say: Play as Alyx Vance in VR as you explore Combine-controlled City 17, solve hands-on puzzles, scavenge supplies, and fight. Players like: Immersive World Interaction · Detailed Environments · Natural VR Controls
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Half-Life: Alyx is Valve’s VR return to the Half-Life series. It’s the story of an impossible fight against a vicious alien race known as the Combine, set between the events of Half-Life and Half-Life 2. Playing as Alyx Vance, you are humanity’s only chance for survival.
Mar 23, 2020
In this game, you can…
- flick your hand to pull distant items straight into your grasp.
- hold your hand over your mouth to hide from Jeff, then creep past him without making a sound while he hunts by hearing.
- grab a health injector during a firefight and immediately stab it into your opposite wrist to stay alive.
- catch a fresh ammo clip mid-air, slam it in, chamber a round, and keep firing while enemies swarm your cover.
- physically rummage through drawers, fridges, shelves, and filing cabinets for bullets and supplies instead of clicking a loot button.
- throw bottles through windows to lure enemies, then watch the glass shatter and leave debris and a puddle behind.
- carry Gnome Chompski through the entire game to earn an achievement.
9The Planet Crafter
- Players say: Stranded on a barren planet, gather resources, craft survival gear, and build machines that gradually create a living world. Players like: Visible Planet Transformation · Relaxed No-Combat Survival · Satisfying Progression
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A space survival open world terraforming crafting game, designed for 1 to 10 players. Alter the ecosystem of an inhospitable planet to render it habitable for humanity. Survive, gather resources, and build your base. Then, generate oxygen, warmth, and pressure to create a brand new biosphere.
Apr 10, 2024
In this game, you can…
- build too low and slowly watch the rising waterline flood your entire starter base into a lake.
- turn a dead red planet into blue skies, lakes, grass, and forests.
- launch rockets to boost terraforming, and watch them crash into each other if you fire too many.
- upgrade from hand-built survival gear to drones, auto-crafters, and production lines that run the planet for you.
- place grass spreaders, tree spreaders, and butterfly or frog setups to grow specific patches of life exactly where you want.
- explore wrecks and hidden ship interiors, read logs, and piece together an eerie subplot from what you find.
- reach the point where the planet is breathable, oxygen stops mattering, and drones start sorting crates while you travel by portals.
10SPORE™
- Players say: Guide a species from tide-pool cell to spacefaring civilization, shaping its creatures, societies, vehicles, and starships along the way. Players like: Creature Creator · Distinct Evolution Stages · Childhood Nostalgia
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Be the architect of your own universe with Spore, an exciting single-player adventure. From Single Cell to Galactic God, evolve your creature in a universe of your own creations.
Dec 19, 2008
In this game, you can…
- start as a microscopic cell, eat your way bigger, and end up running a spacefaring empire.
- design a species from scratch, then watch those body choices change what you can do in every later stage.
- spend days befriending the Grox, succeed, and trigger a galaxy-wide dogpile because everyone else wants you dead.
- try to befriend another creature by dancing, get laughed at, and decide to make it extinct instead.
- build a tribe, craft tools, equip weapons and instruments, and either conquer neighbors or win them over socially.
- take over a planet in vehicles, pushing conquest through military, economy, religion, and trade.
- reach space and get an explorable galaxy of star systems where you can trade, conquer, and hunt for artifacts.
- create your own missions and custom adventures with an in-game editor and play them like mini campaigns.
