Top-Rated Free Aliens Games on Steam
27 free Aliens games with 500+ reviews and a 70%+ positive rating, newest first.
Browse all Aliens →
Darkenstein 3D - 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.
Oct 21, 2025
Nirvana - 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...
Feb 1, 2025
Finn Dorset's Institute For Livestock Replication - 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!
Oct 2, 2024
Super Sus - 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!
Jul 30, 2024
100 Aliens Cats - 👽🛸 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? 🕵️♂️🐈✅
Jun 9, 2024
Bring Me that Shawarma - A visual novel about shawarma, consisting of multiple episodes.
Jun 7, 2024
Classic Marathon - 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.
May 10, 2024
FROM ASHES, BLOOM - A minimalist rogue-like tower defense where you protect Earth against humanity.
Mar 11, 2024
Unnamed Space Idle - 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.
Jul 27, 2023
South Scrimshaw, Part One - 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.
Jun 9, 2023
Pixel Starships - 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.
May 23, 2023
Chicken Invaders Universe - A deliciously addictive core of finger-blistering shooting action, surrounded by delectable morsels of galactic exploration, spacecraft customization, and community competitions.
Dec 15, 2022
Bakso Simulator - Create the most successful bakso business in this world!
Oct 8, 2022
Galaxy Life - 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!
Aug 31, 2022
Alien Removal Division - 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.
Jun 17, 2022
Trimps - 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.
May 2, 2022
Crysis® 3 - 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.
Jun 4, 2020
Chex Quest HD - 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!
May 18, 2020
Black Skylands: Origins - 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!
Apr 30, 2020
Alien Swarm: Reactive Drop - 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.
Apr 20, 2017
Half-Life: A Place in the West - 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.
Sep 29, 2016
Evolve Stage 2 - 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.
Feb 10, 2015
Get Off My Lawn! - 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!
Nov 11, 2014
Star Conflict - 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!
Feb 27, 2013
Alien Swarm - Co-operative multiplayer game and complete code base available for free.
Jul 19, 2010
Command & Conquer™ 3: Kane’s Wrath - In the name of Kane! The Command & Conquer™ series continues to thrive with Command & Conquer™ 3: Kane’s Wrath.
Nov 13, 2009
Command & Conquer 3 Tiberium Wars™ - 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
Nov 13, 2009
