Best Aliens games on Steam
Unlike generic lists, our strategy game recommendations use a rigorous analysis of Steam user reviews to identify and feature only the best, community-validated aliens games. For those who prefer not to search, lists of the most played, top deals and best free aliens games are available at the bottom of the page.
Filters & Lists
Swordbreaker The Game
The Swordbreaker game is interactive fiction with lots of illustrations where you and you alone get to choose the storyline and the ending!
Garfield Kart
Join Garfield and his friends in the funniest fast and fur-ious game! What character do you want to play with? Garfield, Odie, Jon, Nermal... you choose! Take part in no-holds-barred crazy races.
Weapon of Choice DX
Weapon of Choice is a high-energy, side-scroller in which each playable character is unique with their own special weapon and abilities! Blast insane aliens, find new player characters, and choose between branching paths!
Templar Battleforce
An addictive mix of strategic combat and army building, with the precision of an RPG. Design your squad members' exact build of equipment and talents to create unique fireteam combinations. Step into the pilot suit of a Leviathan mech, lead the Templar Knights in turn-based tactical warfare.
The Red Solstice
2280 A.D. The last few survivors of a ruined Earth seek a new home: Mars, a planet whose inhabitants didn't take too kindly to outsiders. The Red Solstice is a tense, tactical, squad-based action game. Fight to survive with up to 8 players in co-op, or lead your own squad in single-player mode.
Axiom Verge
Explore and uncover the mystery of a surreal alien world by blasting aliens and glitching your environment in this intense retro side-scrolling action/adventure.
Galactic Civilizations III
Build a civilization that will stand the test of time in the largest space-based strategy game ever! Choose from dozens of unique races and make a name for yourself across the galaxy through diplomacy, espionage, technological advances, and more.
Halo: Spartan Strike
Halo: Spartan Strike makes you a Spartan supersoldier battling evil forces. Delve into 30 challenging missions through cities and jungles using a devastating arsenal of weapons, abilities and vehicles including the iconic Warthog against the Covenant and Promethean enemies. *DirectX feature level 10 required*
It came from space and ate our brains
It came from space and ate our brains is a unique Arcade top-down shooter. Looking for addicting gameplay, four-player co-op mode, and tons of aliens to send into oblivion? You’ve come to the right place!
Outcast 1.1
Outcast 1.1 is an enhanced version of the critically acclaimed action-adventure game developed in 1999 by Appeal for the PC.
Warhammer 40,000: Armageddon
In this hex-based, turn-based strategy game, players will lead the Imperial forces of the Armageddon Steel Legion and Space Marines from a variety of Chapters against the Ork invasion through over 30 scenarios, on the hostile terrain of the planet and its gigantic Hive Cities.
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!
Alien: Isolation
Discover the true meaning of fear in Alien: Isolation, a survival horror set in an atmosphere of constant dread and mortal danger.
DG2: Defense Grid 2
Setting the bar as the definitive tower defense game, Defense Grid 2 introduces new worlds and threats to test your tower placement strategies. With a bold new look and the addition of new game modes, player-versus-player and multiplayer co-op, every play brings fun new opportunities and challenges.
Freedom Planet
Fight your way across the celestial world of Avalice where cats are green, motorcycles drive up walls and monster girls do most of the buttkicking! Freedom Planet is a cartoony, combat-based platform adventure that pits a spunky dragonoid and her friends against an alien attack force.
Shattered Planet
Explore a dangerous planet that's different every time and try to survive! The Galactic Union's job for you is clear: research the alien wildlife -- for science! However, in this case, researching may include lasers, explosions, hungry aliens, space sushi, and other similarly delicious-or-terrifying hazards.
Xenonauts
Xenonauts is a strategy game in which you control a multi-national military organisation defending a Cold War-era Earth from alien invasion, using small squads of persistent soldiers to eliminate the extraterrestrials and recover their technology in turn-based ground combat.
Pandora: First Contact
Pandora: First Contact is a science fiction 4X turn-based strategy game on a planetary scale. Our Earth has been exhausted and colonial attempts on other planetary bodies have been in vain. Finally, after decades of exploration, an interstellar probe has brought promise of a new world.
UFO: Aftermath
UFO: Aftermath is a 3D isometric, tactical strategy game with a rich and compelling sci fi story.
The Last Federation
From the creators of AI War: Fleet Command comes an all-new grand strategy title with turn-based tactical combat, set in a deep simulation of an entire solar system and its billions of inhabitants. You are the last of a murdered race, determined to unify or destroy the 8 others.
Beware Planet Earth
Beware Planet Earth! is a beguiling mix of classic tower defense and time management coming to PC via Steam for the first time. Save your cows from the Martian invasion by building an effective defense using towers, traps and objects, and also by firing your Zapper directly at the invading force of little green men!
Halo: Spartan Assault
Halo: Spartan Assault brings the excitement of Halo combat to Steam for the very first time. Battle your way through 30 action-packed missions against the Covenant as you explore the origin of the Spartan Ops program featured in Halo 4. *DirectX feature level 10 required. *Most played aliens games on Steam
Take a look at the top aliens games that are currently attracting the largest player bases on the Steam platform, as of April 19th 2025.
1. Alien: Isolation
Discover the true meaning of fear in Alien: Isolation, a survival horror set in an atmosphere of constant dread and mortal danger. Alien: Isolation is a horror, survival horror and sci-fi game developed by Creative Assembly and Feral Interactive (Linux) and published by Feral interactive (Mac), Feral Interactive (Linux) and SEGA. Released on October 06th 2014 has received 60,046 reviews of which 55,969 were positive and 4,077 were negative resulting in an impressive rating of 9.2 out of 10. The game has hit the top spot as the #1 most played aliens game, thanks to its 239 peak concurrent players over the last day.
9.2
55,969
4,077
239
players
2. Galactic Civilizations III
Build a civilization that will stand the test of time in the largest space-based strategy game ever! Choose from dozens of unique races and make a name for yourself across the galaxy through diplomacy, espionage, technological advances, and more. Galactic Civilizations III is a aliens, sci-fi and 4x game developed and published by Stardock Entertainment. Released on May 14th 2015 has received 10,270 reviews of which 7,867 were positive and 2,403 were negative resulting in a rating of 7.5 out of 10. While seeing 191 players online at once in the last 24 hours, this game is currently ranked #2 among aliens games based on player count.
7.5
7,867
2,403
191
players
3. Aliens: Fireteam Elite
Aliens: Fireteam Elite is a cooperative third-person survival game set in the iconic Alien Universe. Battle through hordes of different types of Xenomorph, customize your character and gear, and level-up as you try to contain this ever-growing threat. Aliens: Fireteam Elite is a co-op, shooter and aliens game developed by Cold Iron Studios and published by Cold Iron Studios and Focus Entertainment. Released on August 23rd 2021 has received 24,049 reviews of which 19,214 were positive and 4,835 were negative resulting in a rating of 7.9 out of 10. While seeing 186 players online at once in the last 24 hours, this game is currently ranked #3 among aliens games based on player count.
7.9
19,214
4,835
186
players
4. Crysis 3 Remastered
Experience the single-player experience from the iconic first-person shooter, Crysis 3, optimized to take advantage of today's hardware in Crysis 3 Remastered. Crysis 3 Remastered is a action, fps and shooter game developed by Crytek and Saber Interactive and published by Crytek. Released on November 17th 2022 has received 5,440 reviews of which 4,802 were positive and 638 were negative resulting in a rating of 8.5 out of 10. With 110 concurrent players in the last 24 hours, the game currently holds the #4 spot among the most played aliens games.
8.5
4,802
638
110
players
5. EARTH DEFENSE FORCE 4.1 The Shadow of New Despair
It's a fight for the future of the planet between the Ravagers, a merciless swarm of alien invaders, and the Earth Defense Force (EDF) in this third-person shooter.Play as four different classes in over 80 missions with a range of 800 weapons at your disposal.Co-op play supported. EARTH DEFENSE FORCE 4.1 The Shadow of New Despair is a action, third-person shooter and co-op game developed by SANDLOT and published by D3PUBLISHER. Released on July 18th 2016 has received 9,987 reviews of which 9,488 were positive and 499 were negative resulting in an impressive rating of 9.2 out of 10. The game currently holds the #5 spot among the most played aliens games.
9.2
9,488
499
89
players
6. Aliens vs. Predator™
Survive, hunt and prey in the deadly jungles and swamps in distinctly new and thrilling first person gameplay. Aliens vs. Predator™ is a action, fps and aliens game developed by Rebellion and published by SEGA. Released on February 16th 2010 has received 19,673 reviews of which 17,899 were positive and 1,774 were negative resulting in a rating of 8.9 out of 10. The game currently holds the #6 spot among the most played aliens games.
8.9
17,899
1,774
77
players
7. Gatekeeper
Gatekeeper is a fast-paced rogue-like. Go on a quest to find the stolen Heart of the Universe and shoot your way through the hordes of machine enemies guarding the planetary gates. Play solo or in 4 people co-op and become the next Guardian! Gatekeeper is a early access, online co-op and action roguelike game developed by Gravity Lagoon and published by HypeTrain Digital. Released on May 13th 2024 has received 1,585 reviews of which 1,352 were positive and 233 were negative resulting in a rating of 8.2 out of 10. The game currently holds the #7 spot among the most played aliens games.
8.2
1,352
233
66
players
8. X-COM: UFO Defense
You are in control of X-COM: an organization formed by the world's governments to fight the ever-increasing alien menace. X-COM: UFO Defense is a strategy, classic and turn-based strategy game developed by MicroProse Software and Inc and published by 2K. Released on September 04th 2008 has received 3,767 reviews of which 3,571 were positive and 196 were negative resulting in an impressive rating of 9.1 out of 10. The game currently holds the #8 spot among the most played aliens games.
9.1
3,571
196
45
players
9. Duke Nukem Forever
The King arrives with an arsenal of over-the-top weapons, giant explosions and pure unadulterated fun! Duke Nukem Forever is a fps and action game developed by Gearbox Software and published by 2K. Released on June 09th 2011 has received 10,897 reviews of which 7,517 were positive and 3,380 were negative resulting in a rating of 6.8 out of 10. The game currently holds the #9 spot among the most played aliens games.
6.8
7,517
3,380
34
players
10. Aliens: Colonial Marines Collection
You & your friends are the deadliest killers in the galaxy – the US Colonial Marines. It’s up to you to not just survive, but wipe out the Xeno infestation. Aliens: Colonial Marines Collection is a action, fps and aliens game developed by Gearbox Software and published by SEGA. Released on May 01st 2012 has received 11,437 reviews of which 6,965 were positive and 4,472 were negative resulting in a rating of 6.0 out of 10. The game currently holds the #10 spot among the most played aliens games.
6.0
6,965
4,472
32
players
Best deals on aliens games on Steam
Discover fantastic savings with the best discounts on a variety of aliens games available on Steam right now, updated on April 19th 2025. Looking for even more deals? Use the search filters to explore a wider range of discounted aliens games.
1. Destroy All Humans!
The cult-classic returns! Terrorize the people of 1950's Earth in the role of the evil alien Crypto-137. Harvest their DNA and bring down the US government in the faithful remake of the legendary alien invasion action adventure. Annihilate puny humans using an assortment of alien weaponry and psychic abilities. Destroy All Humans! is a action, adventure and villain protagonist game developed by Black Forest Games and Pandemic Studios and published by THQ Nordic. Released on July 28th 2020 has received 10,783 reviews of which 9,960 were positive and 823 were negative resulting in a rating of 9.0 out of 10. Featuring a massive 90% discount, this game currently holds the #1 spot in the best deals for aliens category.
9.0
9,960
823
-90%
30.90€
3.09€
2. Alien Breed 2: Assault
Can you survive the alien onslaught? Gamers across the world will now have a chance to play the next chapter in this high-budget, high-quality series. Alien Breed 2: Assault is a action, shooter and aliens game developed and published by Team17 Digital Ltd. Released on September 22nd 2010 has received 1,002 reviews of which 698 were positive and 304 were negative resulting in a rating of 6.7 out of 10. Thanks to its incredible 90% discount, this game is now the #2 best deal in aliens games.
6.7
698
304
-90%
9.99€
0.99€
3. Alien Breed 3: Descent
Experience the final explosive chapter in the Alien Breed series and uncover the horrifying truth surrounding the existence of the Breed. Launch discount good thru Nov. 24 10am PST. Alien Breed 3: Descent is a action, shooter and isometric game developed and published by Team17 Digital Ltd. Released on November 17th 2010 has received 573 reviews of which 427 were positive and 146 were negative resulting in a rating of 7.1 out of 10. Thanks to its incredible 88% discount, this game is now the #3 best deal in aliens games.
7.1
427
146
-88%
10.00€
1.20€
4. Alien: Isolation
Discover the true meaning of fear in Alien: Isolation, a survival horror set in an atmosphere of constant dread and mortal danger. Alien: Isolation is a horror, survival horror and sci-fi game developed by Creative Assembly and Feral Interactive (Linux) and published by Feral interactive (Mac), Feral Interactive (Linux) and SEGA. Released on October 06th 2014 has received 60,046 reviews of which 55,969 were positive and 4,077 were negative resulting in an impressive rating of 9.2 out of 10. Currently offered at a significant 87% discount, this title has earned the #4 position in the best deals for aliens games.
9.2
55,969
4,077
-87%
40.77€
5.30€
5. Shadowgrounds
Shadowgrounds breathes fresh air into the action genre with explosive combat sequences, an innovative weapon upgrade system, and an intriguing storyline. The adrenaline-pumping, top-down gameplay and audiovisual fireworks set the scene for this new action experience which also includes single computer (split keyboard or joystick) co-op... Shadowgrounds is a top-down shooter, sci-fi and aliens game developed and published by Frozenbyte. Released on May 08th 2006 has received 1,555 reviews of which 1,266 were positive and 289 were negative resulting in a rating of 7.8 out of 10. Currently offered at a significant 80% discount, this title has earned the #5 position in the best deals for aliens games.
7.8
1,266
289
-80%
5.00€
1.00€
6. EARTH DEFENSE FORCE 4.1 The Shadow of New Despair
It's a fight for the future of the planet between the Ravagers, a merciless swarm of alien invaders, and the Earth Defense Force (EDF) in this third-person shooter.Play as four different classes in over 80 missions with a range of 800 weapons at your disposal.Co-op play supported. EARTH DEFENSE FORCE 4.1 The Shadow of New Despair is a action, third-person shooter and co-op game developed by SANDLOT and published by D3PUBLISHER. Released on July 18th 2016 has received 9,987 reviews of which 9,488 were positive and 499 were negative resulting in an impressive rating of 9.2 out of 10. Currently offered at a significant 73% discount, this title has earned the #6 position in the best deals for aliens games.
9.2
9,488
499
-73%
16.52€
4.46€
7. Gatekeeper
Gatekeeper is a fast-paced rogue-like. Go on a quest to find the stolen Heart of the Universe and shoot your way through the hordes of machine enemies guarding the planetary gates. Play solo or in 4 people co-op and become the next Guardian! Gatekeeper is a early access, online co-op and action roguelike game developed by Gravity Lagoon and published by HypeTrain Digital. Released on May 13th 2024 has received 1,585 reviews of which 1,352 were positive and 233 were negative resulting in a rating of 8.2 out of 10. Currently offered at a significant 58% discount, this title has earned the #7 position in the best deals for aliens games.
8.2
1,352
233
-58%
15.02€
6.31€
8. Aliens versus Predator Classic 2000
Aliens Versus Predator Classic 2000 features the Colonial Marine, Alien and Predator Campaigns and the frenetic single-player Skirmish mode from the original title: Alien Versus Predator Gold Edition, which was released to massive acclaim in 2000. Aliens versus Predator Classic 2000 is a fps, classic and action game developed and published by Rebellion. Released on January 15th 2010 has received 2,616 reviews of which 2,294 were positive and 322 were negative resulting in a rating of 8.4 out of 10. Currently offered at a 47% discount, this title has earned the #8 position in the best deals for aliens games.
8.4
2,294
322
-47%
5.02€
2.66€
9. 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! Chenso Club is a aliens, co-op and action roguelike game developed by Pixadome and published by Aurora Punks. Released on September 01st 2022 has received 311 reviews of which 234 were positive and 77 were negative resulting in a rating of 7.1 out of 10. Currently offered at a 41% discount, this title has earned the #9 position in the best deals for aliens games.
7.1
234
77
-41%
16.92€
9.98€
Free aliens games on Steam
Check out this fantastic list of free-to-play aliens games you can enjoy on Steam right now, updated on April 19th 2025. Looking for even more free titles? Use the search filters to explore a wider range of free to play aliens games.
1. 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? 🕵️♂️🐈✅ 100 Aliens Cats is a free to play, cats and aliens game developed by 100 Cozy Games and Cats and published by 100 Cozy Games. Released on June 09th 2024 has received 1,579 reviews of which 1,505 were positive and 74 were negative resulting in an impressive rating of 9.0 out of 10. The game currently holds the #1 spot among the most played free aliens games on Steam.
9.0
1,505
74
9
players
2. Void Whispers
Assume the role of a broadcast engineer in a tranquil city. All seems peaceful until the sky above starts to reveal something deeply unsettling. Void Whispers is a free to play, horror and psychological horror game developed and published by Eduardo Scarpato. Released on April 06th 2024 has received 364 reviews of which 339 were positive and 25 were negative resulting in a rating of 8.6 out of 10. The game currently holds the #2 spot among the most played free aliens games on Steam.
8.6
339
25
1
players
3. 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. Alien Removal Division is a parkour, fps and action game developed by Enchanted Bean Studios and published by Breda University of Applied Sciences. Released on June 17th 2022 has received 1,056 reviews of which 932 were positive and 124 were negative resulting in a rating of 8.4 out of 10. The game currently holds the #3 spot among the most played free aliens games on Steam.
8.4
932
124