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.
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We created this unique single player game with a combination of Tower Defence and Roguelike. Come and create your maze, build your turret, defeat the invaders, and save the world!
1000 days to escape
Only 1000 days left until the end of the world. You have to realize the largest space program ever to save as many people as you can. Explore planets, colonize them, help people find a new home.
Galaxy Squad
Galaxy squad is a hardcore turn-based tactical roguelike, inspired by FTL and XCOM.
EARTH DEFENSE FORCE 5
Stand and fight for humanity. This arcade shooter takes place in the year 2022, as the Earth Defense Force fends off an all-out attack by unknown life forms. Become an EDF soldier, battle against endless hordes of immense enemies, and restore peace to the earth.
Eden Rising
Brace yourself for a brand new action-packed Open World. Explore a huge world to gather materials for gear and defenses. Use everything at your disposal to defend your bases and defeat hordes of hostile monsters. Play solo or up to 8-player online!
Iron Marines
Real-time strategy battles in amazing sci-fi worlds! Command brave soldiers, mighty mechas and powerful aliens to face the greatest challenges in hostile alien worlds. The galaxy needs you!
Road to Eden
Road to Eden is a third-person multiplayer survival coop game, set within the post-apocalyptic ruins of a world destroyed by an alien invasion. You wake up at the side of the road with no memory and must team up with other survivors to make the long and dangerous journey to Eden.
Cows VS Vikings
You think you’ve seen everything in Stream already?! No, buddy, you never saw anything like that before! The Vikings against the cows! Show them the strength of Odin and twist their horns off!
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.
PLANET ALPHA
PLANET ALPHA, a beautiful alien world filled with mystery and danger. Pursued by relentless enemies, you must harness the power of night and day as you struggle to survive.
Earthfall
NOW AVAILABLE! When the Earth falls to an extra-terrestrial invasion, humanity becomes an endangered species. Earthfall is a four-player cooperative shooter that challenges players to survive hordes of ruthless alien drones and their inscrutable masters.
Space Hulk: Deathwing Enhanced Edition
Space Hulk: Deathwing - Enhanced Edition is a First-Person Shooter based on Games Workshop’s cult classic board game set in Warhammer 40,000 universe. Expanding upon the original game, and featuring a host of new content, new features and a richer multiplayer mode.
Quarantine Circular
First, do no harm. From the award-winning team behind Thomas Was Alone and Subsurface Circular comes another experimental short, the next mutation in text-based adventure. In the middle of a world-ending pandemic, a group of scientists discover the galaxy has been watching.
Signal Simulator
Game inspired by SETI. Take the role of a scientist to find an extraterrestrial signal .Control massive Radio Antennas by using interactive control in your Observatory. Detect , download and decode unknown or story telling signals. Manage and Maintain an electrical system to improve your systems and make it more efficient.
Attack of the Earthlings
Take on Galactoil, a comically dysfunctional intergalactic energy corporation, and its larger-than-life employees in a tactical-stealth game that fuses satisfying strategic gameplay and dark comedy in a quirky single-player story.
Subnautica
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.
Swarm Queen
Swarm Queen is a quick-to-learn but tactical and challenging tug-of-war strategy game about insectoid aliens trying to murder each other.
Megaton Rainfall
Become an indestructible interdimensional superbeing in this first-person superhero game, and save Earth from an alien invasion. Be careful though - you are so powerful you can destroy entire skyscrapers (unintentionally) when you miss your otherworldly target...
Let Them Come
Let Them Come is a fast paced pixel art shoot ‘em up. Twitchy trigger fingers and focused battle tactics are the order of the day as wave after wave of alien-like creatures try to take you down.
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 June 15th 2025.
1. 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 24,731 reviews of which 19,732 were positive and 4,999 were negative resulting in a rating of 7.8 out of 10. The game has hit the top spot as the #1 most played aliens game, thanks to its 489 peak concurrent players over the last day.
7.8
19,732
4,999
489
players
2. 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 60,831 reviews of which 56,716 were positive and 4,115 were negative resulting in an impressive rating of 9.2 out of 10. While seeing 264 players online at once in the last 24 hours, this game is currently ranked #2 among aliens games based on player count.
9.2
56,716
4,115
264
players
3. 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 10,282 reviews of which 7,874 were positive and 2,408 were negative resulting in a rating of 7.5 out of 10. While seeing 173 players online at once in the last 24 hours, this game is currently ranked #3 among aliens games based on player count.
7.5
7,874
2,408
173
players
4. Gatekeeper
Gatekeeper is a fast-paced rogue-like. Go on a quest to chase down Chaos and reclaim the stolen Heart of Time, fighting your way through relentless enemy forces. Play solo or in 4-player co-op and become the next Gatekeeper! 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 1,653 reviews of which 1,409 were positive and 244 were negative resulting in a rating of 8.2 out of 10. With 116 concurrent players in the last 24 hours, the game currently holds the #4 spot among the most played aliens games.
8.2
1,409
244
116
players
5. 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 19,953 reviews of which 18,175 were positive and 1,778 were negative resulting in a rating of 8.9 out of 10. With 104 concurrent players in the last 24 hours, the game currently holds the #5 spot among the most played aliens games.
8.9
18,175
1,778
104
players
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 10,054 reviews of which 9,554 were positive and 500 were negative resulting in an impressive rating of 9.2 out of 10. The game currently holds the #6 spot among the most played aliens games.
9.2
9,554
500
84
players
7. 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 5,793 reviews of which 5,108 were positive and 685 were negative resulting in a rating of 8.5 out of 10. The game currently holds the #7 spot among the most played aliens games.
8.5
5,108
685
76
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 3,799 reviews of which 3,602 were positive and 197 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
3,602
197
43
players
9. Destroy All Humans! 2 - Reprobed
Crypto is back with a license to probe. The alien invader returns, groovier than ever. Experience the swinging ‘60s in all its chemical-induced glory and take revenge on the KGB for blowing up your mothership. You’ll have to form alliances with members of the very species you came to enslave. Destroy All Humans! 2 - Reprobed is a third-person shooter, aliens and action-adventure game developed by Black Forest Games and published by THQ Nordic. Released on August 30th 2022 has received 2,747 reviews of which 2,135 were positive and 612 were negative resulting in a rating of 7.5 out of 10. The game currently holds the #9 spot among the most played aliens games.
7.5
2,135
612
35
players
10. 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 10,992 reviews of which 7,586 were positive and 3,406 were negative resulting in a rating of 6.8 out of 10. The game currently holds the #10 spot among the most played aliens games.
6.8
7,586
3,406
33
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 June 15th 2025. Looking for even more deals? Use the search filters to explore a wider range of discounted aliens games.
1. 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 10,992 reviews of which 7,586 were positive and 3,406 were negative resulting in a rating of 6.8 out of 10. Featuring a massive 97% discount, this game currently holds the #1 spot in the best deals for aliens category.
6.8
7,586
3,406
-97%
19.99€
0.65€
2. 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 578 reviews of which 431 were positive and 147 were negative resulting in a rating of 7.1 out of 10. Thanks to its incredible 96% discount, this game is now the #2 best deal in aliens games.
7.1
431
147
-96%
9.99€
0.47€
3. 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 312 reviews of which 235 were positive and 77 were negative resulting in a rating of 7.1 out of 10. Thanks to its incredible 95% discount, this game is now the #3 best deal in aliens games.
7.1
235
77
-95%
9.99€
0.53€
4. 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 10,282 reviews of which 7,874 were positive and 2,408 were negative resulting in a rating of 7.5 out of 10. Currently offered at a significant 94% discount, this title has earned the #4 position in the best deals for aliens games.
7.5
7,874
2,408
-94%
28.99€
1.98€
5. 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 60,831 reviews of which 56,716 were positive and 4,115 were negative resulting in an impressive rating of 9.2 out of 10. Currently offered at a significant 93% discount, this title has earned the #5 position in the best deals for aliens games.
9.2
56,716
4,115
-93%
39.99€
3.01€
6. X-COM: Apocalypse
There's something evil in the city tonight... Earth has been ravaged by human excess, petty conflict and alien invasion. The world's population has been herded into huge cities, the first of which was Mega Primus. 2084: A Utopia shattered, social collapse and civil unrest reigns in Mega Primus. Fiendish aliens terrorize the city. X-COM: Apocalypse is a strategy, turn-based and tactical game developed by MicroProse Software and Inc and published by 2K. Released on September 04th 2008 has received 897 reviews of which 792 were positive and 105 were negative resulting in a rating of 8.3 out of 10. Currently offered at a significant 93% discount, this title has earned the #6 position in the best deals for aliens games.
8.3
792
105
-93%
4.99€
0.35€
7. Alien Shooter 2: Reloaded
This is the unique alloy of arcade action and RPG elements which combines well-established world of classical games and unmatched dynamics of the first part. Alien Shooter 2: Reloaded is a aliens, looter shooter and shoot 'em up game developed and published by Sigma Team Inc.. Released on May 27th 2009 has received 3,283 reviews of which 3,012 were positive and 271 were negative resulting in a rating of 8.8 out of 10. Currently offered at a significant 92% discount, this title has earned the #7 position in the best deals for aliens games.
8.8
3,012
271
-92%
4.99€
0.40€
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 3,799 reviews of which 3,602 were positive and 197 were negative resulting in an impressive rating of 9.1 out of 10. Currently offered at a significant 91% discount, this title has earned the #8 position in the best deals for aliens games.
9.1
3,602
197
-91%
4.99€
0.48€
9. 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 1,006 reviews of which 701 were positive and 305 were negative resulting in a rating of 6.7 out of 10. Currently offered at a significant 90% discount, this title has earned the #9 position in the best deals for aliens games.
6.7
701
305
-90%
9.99€
0.99€
10. 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 10,837 reviews of which 10,010 were positive and 827 were negative resulting in a rating of 9.0 out of 10. Currently offered at a significant 85% discount, this title has earned the #10 position in the best deals for aliens games.
9.0
10,010
827
-85%
29.99€
4.50€
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 June 15th 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 1,694 reviews of which 1,616 were positive and 78 were negative resulting in an impressive rating of 9.1 out of 10. The game currently holds the #1 spot among the most played free aliens games on Steam.
9.1
1,616
78
5
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 378 reviews of which 352 were positive and 26 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
352
26
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 1,060 reviews of which 936 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
936
124