Aliens
1302 gamesSteam releases tagged Aliens. Tags come from community voting on SteamSpy and reflect how players actually describe the game.
Tracked
1,295
Released (30d)
1
Upcoming
0
Median price (KRW)
5,600
In the last 30 days, 1 new aliens games released on Steam (2 over the last 90 days). 113 are listed as free-to-play.

Microcosmum 2
A relaxing strategy game featuring unconventional gameplay. Your objectives include development, evolution, border expansion and protection of your hive.
2 Mar, 2024

Chimera CUSTOM XG
Grab your friends and blast through alien hordes in this side-scrolling bullet hell shooter with up to four-player PvE co-op. Play solo or team up as genetically enhanced super soldiers to defend Earth, uncover conspiracies, and survive the chaos together.
19 Mar, 2025

Get Off My Lawn!
They came in peace, but messed with the wrong old man. Armed with a musket, 78 year old Murray 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 lawn!
11 Nov, 2014

Mental State. Game One
«Mental State. Game One" is a fantastic first–person adventure with elements of the action and horror genres. A unique feature of the game is the "System of Thoughts", which affects the mental state of the main character and the gameplay as a whole.
23 Dec, 2024

The Hive
The Hive is a real-time strategy game with RPG elements where you command an insectoid hive mind. Build and expand your underground colony, harvest resources, and evolve your creatures using DNA collected from defeated enemies. Can you survive the dangers of this beautiful yet hostile underworld?
25 Aug, 2016

Swarm Queen
A quick-to-learn but challenging real-time strategy game where you spawn an army of space-bugs that control themselves.
19 Dec, 2017

Starship Troopers: Terran Command
Lead the Mobile Infantry in this RTS game set in the Starship Troopers film universe. Balance your army composition with a diverse set of unit types, overcome line-of-sight and line-of-fire challenges through tactical positioning, and use special abilities to smash the Arachnid hordes!
16 Jun, 2022

VERZEUS
Blast and weave your way through enemy fire while managing a wide variety of ship power-ups in this retro style horizontal shoot-'em-up!
4 Mar, 2024

Rebots
Rebots is a first-person automation game with an expansive universe to explore. Using intelligent(ish) rebots, you can gather resources, terraform planets, and scan all of the things. Traverse the galaxy in the name of space capitalism!
7 Oct, 2024

SENTRY
SENTRY is an action-defense first person shooter where you defend your spaceship against invading aliens. Plot an escape route through hostile space and battle the enemy across your vessel with the support of traps, turrets and environmental destruction.
25 Mar, 2024

Genome Guardian
COMBINE WEAPONS in the microscopic roguelite turret shooter with macroscopic depth. Survive 6 modes using an astounding array of turrets, perks, mutations and power-ups on this psychedelic journey to the heart of the abyss. Shmup Mode turns it into a vertical shoot 'em up!
7 May, 2024

Kaptain Brawe: A Brawe New World
Step into a hilarious, steampunk-tinged point n click space adventure! Play as Captain Brawe, Agent Luna and Danny across four colorful planets — solve clever puzzles, uncover conspiracies, and meet unforgettable characters (space pirates, secret agents, and eccentric aliens).
20 Jan, 2011

Keng's Little Universe
One civilization, three skies: a planet torn by multiple suns, a cluster ruled by the dark forest law, and a galaxy of ten thousand stars. Anomalies rewrite each run; Story Mode links all three parts; play online with up to 10 players or in co-op; Auto Play runs your civilization while you idle.
16 Oct, 2026

Chenso Club
Aliens are attacking! Who will save us? Chenso Club will! Using chainsaws, hammers, and the aliens’ own life force against them - these fearless warriors will pulverise enemies on their way to victory. Go solo! Go co-op! Go hack those aliens in this action-packed, side-scrolling platform brawler!
1 Sep, 2022

Plan B from Outer Space: A Bavarian Odyssey
Escape the grasp of the Barbvarians! Plan B from Outer Space is a stellar adventure in the style of an interactive book and takes inspiration from classic science-fiction stories and Bavarian culture. Every decision will affect the outcome of your mission; to leave this strange planet unscathed!
28 Oct, 2021

Clash of Swords and Beams
Prepare yourself for an epic showdown in "Clash of Swords and Beams," where your reflexes and strategic thinking are put to the ultimate test! In this fast-paced game, you must survive and resist waves of relentless lasers and warriors.
20 Aug, 2024

Test Subject
An action-packed single-player FPS where you fight your way off an alien ship using fists and power-ups. Test your strength, wits, and resilience to survive and escape.
17 Dec, 2024

Space Accident VR
Step into the future with our groundbreaking VR game set in the year 2119, where humanity embarks on a historic journey into space. Join the "CCM-1" (Callisto Colonization Mission) expedition, aimed at the enigmatic moon of Jupiter - Callisto.
21 Jan, 2025

Colossus Mission - adventure in space, arcade game
Colossus Mission is an arcade game set in a space. Discover secrets of the odd spaceship, who unexpectedly entered Earth orbit.
8 Mar, 2021

Circuit Thunder®
Enter the universe of Circuit Thunder®. Embark on a 2D-platforming adventure with Electrex Bolt® and master the abilities of lightning. Explore vibrant locations, battle novel enemies, unlock new abilities, and experience a powerful story of redemption.
25 Oct, 2024

Halo: The Master Chief Collection
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.
3 Dec, 2019

Cyber Avenger
Cyber Avenger is a top-down action game where you take on the role of a highly skilled covert operative on a dangerous mission to stop a group of terrorists. You must navigate through five maps, facing a variety of enemies, including shotgunners, snipers, melee fighters, kamikazes, and more.
4 Jan, 2024

Samorost 2
Samorost 2 tells a surreal story of a space gnome whose dog just got kidnapped by mischievous aliens. Set out on a short expedition to rescue the pup, deal with curious strangers and relax to the soothing music by Tomáš "Floex" Dvořák.
10 Dec, 2009

Space Grunts
A turn-based game on a planet outpost - with no waiting between turns! Play it at the speed of an arcade game, or take your time and think about your next step.. no matter how fast you take your turn, it might be your last!
12 Jan, 2016

Snake Core
Are you ready to command a range of different units as they battle aliens in a mission-based take on the classic Snake? Select your path to victory!
21 Apr, 2020

The Electrifying Incident: A Monster Mini-Expedition
An adorable bite-sized adventure from the creators of A Monster’s Expedition - explore the facility, avoid the live electricity, and repair the malfunctioning reactor.
15 Apr, 2025

Parasite
This is a roguelike open-world sandbox survival horror set in a modern city. Play as an --redacted-- parasite, possess human hosts, exploit and evolve them to help you survive in a hostile world, all to find out your one true purpose.
25 Mar, 2022

A Whisper in the Twilight: Chapter Two
A first-person story-driven game. A dark sci-fi adventure. Solve the riddles of an ancient moon and discover what your destiny will be.
18 Jul, 2024

Startopia
A once thriving network of space stations and planets have been left lifeless, redundant scars of the apocalypse. Into this age of darkness comes light. You will lead the way in rebuilding the network of space stations to a standard accepted by the individual alien races, attracting them to harness their expertise and research new...
10 Oct, 2013

Mission: Mars
Survive 60 days on Mars against relentless enemy waves. Upgrade your weapons and combat suit, command your squad, deploy mines and explosives, and defend humanity’s last foothold on the Red Planet
2 May, 2024

Butchers Don't Surf!
"Butchers Don't Surf! RELOADED" is an endless runner side-scrolling 3D game with adventure elements.
1 Jun, 2023

SnackTimeActionGame
[Snackable hero experience!]Zombies in the city, a western street corner, a samurai battle... Snack time action game is a 2D action game where you can easily enjoy feeling like a hero or a monster in various situations! 9 types of situations + α&30+ playable characters! The combination is up to you!
14 Nov, 2024

USA 2020
The year 2020 has arrived. A herd of fuckin' ugly reptilians are rushing from the outer space. Crime rate skyrocketed! United States of America is ruined! Wipe out all 12 billion of the green scum!
2 Jun, 2018

Ghost Battalion
Early 2000's inspired 1st/3rd-person shooter, with vehicles, ships, jet packs, multiple foot‑soldier classes, space battles, and so much more. The game features a Single-player campaign with several uniquely designed missions, and multiple Multiplayer modes such as Conquest, FreeForAll, and Escape.
11 Aug, 2026

Stellar Mess: Operation Kush (Chapter 2)
Stellar Mess is a point&click 2D graphic adventure game with retro style, where the least likely hero must rescue the princess and save the galaxy from a tyrannical Stellar Armada. All this while walking through a small town located somewhere in the Argentinian Patagonia.
3 Mar, 2025

Alien street battle
Lock. Load. Save the city… hopefully.
7 Feb, 2020

Star Control®: Origins
Star Control is a space role-playing game in which you command Earth's first interstellar starship on a mission to save the Earth from hostile alien empires.
20 Sep, 2018

Phobos Down
A sci-fi twin stick shooter stripped down to the bare essentials with focus on smooth controls and satisfying action.
7 Dec, 2025

Terminal squad: Sentinel
The age of an active space conquest by Humanity. You are a simple scout who had been sent out to explore a new planet. You must collect information about it and transfer it to the Center. But is it all that simple or is there anything you still don’t know?
19 Dec, 2019

Arcade Classics
Collection of a few arcade classics, remade with a fresh and friendly looking art style and a beautiful soundtrack.
7 Jun, 2023

Andromeda Wing
An action-packed retro arcade shoot 'em up featuring organic and bio-mechanical alien life, including ammonites, centipedes and spiders!
25 Aug, 2017

LOST PLANET® 3
The extreme and unpredictable conditions that characterized the Lost Planet series return, harsher than ever before. Lost Planet 3 reveals new truths about the foreboding planet and the colonial history of E.D.N. III.
26 Aug, 2013

Professor of Magical Studies
Professor of Magical Studies is an interactive magical school novel by Stephen Granade, where your choices control the story. It’s entirely text-based, without graphics or sound effects, and fueled by the vast, unstoppable power of your imagination.
8 Dec, 2022

The Voidness - Lidar Horror Survival Game
The Voidness is a SCI-FI psychological horror game where it takes place inside the void where it's filled with just gloom - the only way to see is by scanning the environment with your range finder device, however you are not alone. Don't breathe ... as they are listening.. and watching.
30 Oct, 2023

The Mims Beginning
Experience a mystical journey with the Mims in this strategic god-like adventure—build, grow, protect, and wield divine powers. Now it's completely free! Also check out our other story-rich fantasy game, The End of the Sun, where you become a tracker of mythical beings and unravel mysteries.
18 May, 2016

Operator8
An unparalleled alien invasion has overwhelmed the Mining Block Facility on the moon Triton, leaving only death and horror in its wake. You are a mercenary known as Operator8 and you alone have been called in to bring a stop to this fierce attack. Destroy the hive mind at all costs!
12 Nov, 2024

Terrorformer TD
Terrorformer TD is a tower defense roguelite with a procedurally generated map that YOU shape! Raise or lower tiles, divert enemy paths and funnel monsters into perfectly designed killzones. Randomly drawn cards result in plenty of run variety, as you seek to survive endless waves of enemies.
9 Sep, 2024

Alien Paradise
Help an extraterrestrial being to enjoy their staying on Planet Earth in this rhythm game.
22 Aug, 2024

魔星兄弟
《魔星兄弟》是一款类暗黑装备驱动型游戏,多种品质、随机数值、随机词条、符文之语、装备强化、队友招募,并辅以种菜养殖等经营玩法,从一无所有到战力巅峰,打败外星侵略者!
11 Mar, 2024

B.I.O.T.A.
Intense 2D action-platformer set in a mining colony infected by an alien plague. In B.I.O.T.A. you can choose your hero, fight gruesome monsters, and customize your 8-bit retro experience with swappable 4-color palettes.
12 Apr, 2022