Top-Rated Free Aliens Games on Steam

27 free Aliens games with 500+ reviews and a 70%+ positive rating, newest first.

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Darkenstein 3D - Players say: A shotgun-wielding drifter fights through enemy fortresses, dodging projectiles and uncovering secrets to rescue his dog. Players like: Old-School Shooter Feel · Fast, Satisfying Combat · Humor and Voice Acting ·
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A retro shooter inspired by classics like Wolfenstein and Doom. Think of it as a tribute, a love letter to the games that defined a generation, with a few modern touches of my own. It’s tough, fast, and demands skill, just the way those old-school shooters did.

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Oct 21, 2025
91% 👍
of 1.6k
Nirvana - Players say: Play as Ari, a young earthling in a mystical temple, combining fast first-person bullet-hell combat, platforming, and new powers. Players like: Fast, Fluid Movement · Enjoyable Combat · Energetic Soundtrack ·
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Wake up and embrace your new powers. In this Bullet Hell Fast-FPS, dare to take on mystical creatures to defeat the God Raj. Nirvana awaits...

Finn Dorset's Institute For Livestock Replication - Players say: Clone moon sheep, sell their wool, and upgrade an alien farm as its landscape changes in this incremental idler. Players like: Hand-Drawn Art · Changing Farm Visuals · Absurd Humor ·
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An animated incremental game about cloning livestock. Make as many moon sheep as you can. Research technology, upgrade your operation and become a clone farm billionaire!

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Oct 2, 2024
84% 👍
of 1.3k
Super Sus - Players say: Crew members finish ship tasks and vote out suspected impostors as hidden killers sabotage the mission and neutral roles pursue goals. Players like: Varied Roles · Social Deduction · Fun With Friends ·
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Welcome to join the multiplayer social deduction game - Super Sus! Engage in intense gameplay with global players, as you strategize to safeguard your spaceship from the cunning Impostors determined to sabotage the mission and eliminate everyone aboard!

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Jul 30, 2024
71% 👍
of 3.0k
100 Aliens Cats - Players say: Scan a hand-drawn alien scene, zoom in, and click 100 hidden cats, using hints when you need help. Players like: Cute Alien Artwork · Relaxing Search · Quick Casual Sessions ·
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👽🛸 100 Aliens Cats - 🐾 Join the cutest adventure in the Aliens themed locations full of cats! Explore the charming hand-drawn artwork of aliens places and Cats as you embark on a quest to find 100 adorable cats hidden throughout the game. 🕵️‍♂️❌ Can you find them all? 🕵️‍♂️🐈✅

Bring Me that Shawarma - Players say: Read episodic tales around Samara’s shawarma shops, where a courier and other characters encounter alien plots and food-themed horror. Players like: Absurd, Offbeat Humor · Interconnected Episode Stories · Distinctive Visual Style ·
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A visual novel about shawarma, consisting of multiple episodes.

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Jun 7, 2024
91% 👍
of 571
Classic Marathon - Players say: As a security officer aboard an alien-attacked colony ship, fight through its decks, solve route puzzles, and uncover the story. Players like: Terminal-Based Story · Sci-Fi Atmosphere · Tactical Gunplay ·
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From the team that brought you Aleph One, the classic sci-fi FPS Marathon from Bungie on Mac revived for modern hardware by the fan community.

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May 10, 2024
91% 👍
of 1.3k
FROM ASHES, BLOOM - Players say: Defend Earth’s oldest tree from human attackers by planting projectile-firing trees and battling waves as a tentacled creature. Players like: Fun Short Sessions · Tree-Based Defense · Colorful Cute Style ·
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A minimalist rogue-like tower defense where you protect Earth against humanity.

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Mar 11, 2024
93% 👍
of 767
Unnamed Space Idle - Players say: Pilot an upgradeable ship through alien fleets, matching weapons to enemies while layered idle systems grow its combat power. Players like: Interconnected Upgrade Systems · Strategic Build Optimization · Steady Unlocks and Progress ·
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Destroy endless waves of alien ships that have all but wiped out humanity in this long form, unfolding, sci-fi idle game. Customize your ship with different weapons and defenses to defeat specific enemy types and utilize a ton of different systems to increase your overall power.

South Scrimshaw, Part One - Players say: Follow a newborn Brillo whale through an alien ocean in a documentary-style visual novel with illustrated biology and field notes. Players like: Detailed Hand-Drawn Art · Imaginative Alien Biology · Documentary-Style Story ·
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South Scrimshaw is the story of a newborn whale in a vast alien ocean. It is a richly illustrated experimental visual novel, written in the style of a nature documentary.

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Jun 9, 2023
99% 👍
of 1.6k
Pixel Starships - Players say: Design a pixel-art starship, assign its crew and AI, then upgrade, explore, and battle other players in a persistent universe. Players like: Ship-Building Depth · Customizable Crew AI · Strategic Combat ·
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Pixel Starships is an FTL-style online sci-fi strategy builder and management game with a competitive PVP tournament. Set in the retro galaxy, your role is to explore space, meet aliens, and develop your ship, crew and AI. The game contains deep strategic and 4x elements. PSS is community-driven.

Chicken Invaders Universe - Players say: Join humanity's fight against vengeful space chickens in a top-down shooter of missions, ship upgrades, and galactic exploration. Players like: Childhood Nostalgia · Classic Shooting · Silly Chicken Humor ·
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A deliciously addictive core of finger-blistering shooting action, surrounded by delectable morsels of galactic exploration, spacecraft customization, and community competitions.

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Dec 15, 2022
91% 👍
of 3.8k
Bakso Simulator - Players say: Run an Indonesian bakso stall: manage supplies and staff, fend off trouble, complete town quests, and grow the business. Players like: Restaurant Management · Relaxing Side Activities · Town Quests ·
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Create the most successful bakso business in this world!

Galaxy Life - Players say: Build a colony of tiny aliens, train troops, defend your base, and battle rivals as you expand across a persistent galaxy. Players like: Childhood Nostalgia · Colony Building · Simple Strategy ·
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The universe is full of Starlings, tiny orange aliens that want to take over the galaxy. Create your own space colony, fight epic battles and discover new planets. Train your soldiers, develop your technology and create unimaginable gadgets. Enjoy this huge social game with friends!

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Aug 31, 2022
92% 👍
of 8.6k
Alien Removal Division - Players say: As the sole survivor of a 1950s facility invasion, wall-run, dash, and shoot your way through alien-filled halls. Players like: Parkour Movement · Fun Alien Shooting · Smooth Controls ·
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The invasion has started and the secret military research facility has fallen leaving only chaos. As the only survivor, you must fight your way through the military base against a horde of frantic aliens. A.R.D. is a FREE single-player first-person shooter made by students from Breda University.

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Jun 17, 2022
89% 👍
of 1.1k
Trimps - Players say: On a hostile planet, manage a growing population of Trimps by gathering resources, fighting, upgrading, and automating their work. Players like: Deep Progression · Flexible Automation · Strategic Choices ·
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A text-based incremental idle game with a ridiculous amount of unique content. Automate old stuff as you unlock new stuff to keep things interesting for hours and hours, no spam clicking necessary! Trimps is everything you love about your favorite games, distilled to their purest form.

Crysis® 3 - Players say: In overgrown New York, Prophet hunts the Alpha Ceph and C.E.L.L., using his Nanosuit, guns, and stealth to fight through enemy territory. Players like: Impressive Visuals · Nanosuit Combat · Predator Bow ·
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The fate of the world is in your hands. New and old enemies threaten the peace you worked so hard to achieve 24 years ago. Your search for the Alpha Ceph continues, but this time you'll also need to expose the truth behind the C.E.L.L. corporation.

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Jun 4, 2020
85% 👍
of 5.6k
Chex Quest HD - Players say: Rescue Bazoik's captives in a cartoon first-person shooter, exploring alien-filled levels and zorching Flemoids back home. Players like: Nostalgic Remake · Cartoon Humor · Cereal-Themed Premise ·
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Travel to the remote planet of Bazoik to free galactic citizens from the evil cereal-eating Flemoids! Venture deep into the caverns of Bazoik, using an array of "zorching" devices to send these nefarious foes back to their home dimension!

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May 18, 2020
80% 👍
of 2.1k
Black Skylands: Origins - Players say: As young Earner Walter, fight Kain’s Falcons in top-down shootouts, grapple between islands, and rebuild your airship home. Players like: Pixel-Art Visuals · Varied Activity Mix · Grappling-Hook Traversal ·
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Black Skylands: Origins shows you the ropes ahead of the main game release. Learn the basic mechanics and meet the main cast of characters of this open-world adventure!

Alien Swarm: Reactive Drop - Players say: Lead marines through alien-infested facilities, combining top-down shooting, class tactics and mission objectives. Players like: Co-op With Friends · Team Class Roles · Workshop Content ·
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Co-operative top-down shooter game available for free. An epic bug hunt featuring a unique blend of co-op play and squad-level tactics.

Half-Life: A Place in the West - Players say: A father, a scientist, and an alien warrior follow child kidnappings to a hidden city in this chapter-based Half-Life comic. Players like: Half-Life Worldbuilding · Distinctive Artwork · Original Story ·
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In a devastated America, sinister commandos are kidnapping children and taking them to a hidden city with a mysterious cosmic tower at its heart – a tower that may prove to be humanity’s salvation, or its doom. Join three survivors in this fan-made comic as they attempt to unlock the city’s secrets.

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Sep 29, 2016
88% 👍
of 755
Evolve Stage 2 - Players say: In 4v1 hunts on Shear, four role-based hunters track a monster as it feeds, evolves, and turns the chase against them. Players like: Distinctive 4v1 Setup · Monster Gameplay · Tense Tracking Hunts ·
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Play Evolve for free with Evolve Stage 2! Evolve Stage 2 is a next-generation free multiplayer shooter featuring addictive 4v1 gameplay. One player-controlled monster must evade and outsmart a team of four uniquely skilled hunters.

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Feb 10, 2015
70% 👍
of 48k
Get Off My Lawn! - Players say: As 78-year-old Murray, shoot waves of aliens attacking your lawn, collect orbs, upgrade weapons, and unleash special powers. Players like: Simple Arcade Defense · Grumpy Alien Showdown · Rising Wave Challenge ·
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They came in peace, but messed with the wrong old man. Armed with a musket, 78 year old Murray Mendelson has single-handedly started an interstellar war. Shoot first and ask questions later in this endless fast paced arcade shooter. Use everything in Murray’s arsenal to keep the aliens off of his perfectly manicured lawn!

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Nov 11, 2014
74% 👍
of 1.7k
Star Conflict - Players say: Pilot customizable combat ships in online PvP and PvE battles, take on missions, and explore open space in a contested alien sector. Players like: Satisfying Space Combat · Varied Ship Designs · Custom Ship Builds ·
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Star Conflict is an action-packed, massively multiplayer space simulation game that puts players in the role of elite pilots engaging in a widespread interplanetary skirmish. The whole world for PVP and PVE!

Alien Swarm - Players say: Lead a four-Marine squad through alien-infested missions, coordinating classes, weapons, and tactics in a top-down co-op shooter. Players like: Cooperative Teamwork · Class-Based Tactics · Intense Alien Fights ·
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Co-operative multiplayer game and complete code base available for free.

Command & Conquer™ 3: Kane’s Wrath - Players say: Lead Kane’s Brotherhood of Nod through a 20-year Tiberium conflict with base building, faction tactics, and real-time battles. Players like: Faction Variety · Skirmish Replayability · Kane’s Story ·
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In the name of Kane! The Command & Conquer™ series continues to thrive with Command & Conquer™ 3: Kane’s Wrath.

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Nov 13, 2009
93% 👍
of 5.9k
Command & Conquer 3 Tiberium Wars™ - Players say: Lead GDI, Nod, or the Scrin in a 2047 RTS of Tiberium harvesting, base construction, and faction-driven campaigns. Players like: Campaign Story · Live-Action Scenes · Faction Variety ·
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The year is 2047. A massive nuclear fireball explodes high in the night sky, marking the dramatic beginning of the Third Tiberium War and the long-awaited return of the most groundbreaking Real-Time Strategy franchise of all time