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
Unstoppable Gorg
Defend the solar system from fearsome aliens by sending satellites into orbit in revolutionary tower defense action!
Earth Defense Force: Insect Armageddon
Thousands of giant insects and aliens once again ravage the earth, and only the Earth Defense Force can stop them.
Galactic Civilizations® II: Ultimate Edition
Get the complete GalCiv II saga including Galactic Civilizations II: Dread Lords, the expansion pack Dark Avatar, and the newest expansion pack Twilight of the Arnor!
Serious Sam 3: BFE
Serious Sam 3: BFE is a prequel to the original indie fast action FPS and Game of the Year sensation - Serious Sam: The First Encounter!
Sins of a Solar Empire: Trinity®
In Sins of a Solar Empire: Trinity, you are the leader of a civilization embroiled in a galactic war, fighting for the survival of your entire race against relentless foes.
Alien Hallway
Players measure stamina with a never-ending stream of green creatures within the borders of a special military mission.
Quake 4
As part of the elite Rhino Squad, you must spearhead Earth’s military invasion of a hostile alien homeworld. But, in this desperate war for humanity’s survival against an unrelenting enemy, you may discover that the only way to defeat them...is to become one of them.
Duke Nukem Forever
The King arrives with an arsenal of over-the-top weapons, giant explosions and pure unadulterated fun!
Red Faction®: Armageddon™
Red Faction: Armageddon Path to War includes 4 new missions, 2 unlockable items and 10 new achievements!
Anomaly: Warzone Earth
Lead an armored squad through the perils of this reversed tower defense action-strategy game!
Crysis 2 - Maximum Edition
Aliens are decimating New York City, only you have the technology to survive. Be The Weapon.
Revenge of the Titans
The ultimate mash-up of Real-time Strategy and Tower Defense!
Dead Space™ 2
Three years after the Necromorph infestation aboard the USS Ishimura, Isaac Clarke awakens from a coma, confused, disoriented, and on a space station called The Sprawl. Explore this world and its zero-g environments to discover the truth about the Unitology and its role in the Necromorph epidemic.
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 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 Swarm
Co-operative multiplayer game and complete code base available for free.
Alien Breed: Impact
Experience the explosive science fiction arcade-shooter that resurrects a much revered franchise in an epic single player and co-op multiplayer campaign.
Serious Sam HD: The Second Encounter
Serious Sam HD: The Second Encounter is a visually upgraded and fully Steam supported remake of the original high-adrenaline single-play and 16-player co-operative arcade-action FPS and Gamespot's Game of the Month!
Aliens vs. Predator™
Survive, hunt and prey in the deadly jungles and swamps in distinctly new and thrilling first person gameplay.
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.
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.
Serious Sam HD: The First Encounter
Serious Sam HD: The First Encounter is a visually upgraded and fully Steam supported remake version of the original high-adrenaline single-play and 16-player co-operative arcade-action FPS which was Gamespot's Game of the Year 2001 and which scored overall of 87% on Metacritic!
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.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 30th 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 24,088 reviews of which 19,247 were positive and 4,841 were negative resulting in a rating of 7.9 out of 10. The game has hit the top spot as the #1 most played aliens game, thanks to its 973 peak concurrent players over the last day.
7.9
19,247
4,841
973
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 60,236 reviews of which 56,157 were positive and 4,079 were negative resulting in an impressive rating of 9.2 out of 10. While seeing 510 players online at once in the last 24 hours, this game is currently ranked #2 among aliens games based on player count.
9.2
56,157
4,079
510
players
3. 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 19,741 reviews of which 17,969 were positive and 1,772 were negative resulting in a rating of 8.9 out of 10. While seeing 237 players online at once in the last 24 hours, this game is currently ranked #3 among aliens games based on player count.
8.9
17,969
1,772
237
players
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 10,272 reviews of which 7,869 were positive and 2,403 were negative resulting in a rating of 7.5 out of 10. With 152 concurrent players in the last 24 hours, the game currently holds the #4 spot among the most played aliens games.
7.5
7,869
2,403
152
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 10,006 reviews of which 9,505 were positive and 501 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
9,505
501
80
players
6. 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 11,466 reviews of which 6,992 were positive and 4,474 were negative resulting in a rating of 6.0 out of 10. The game currently holds the #6 spot among the most played aliens games.
6.0
6,992
4,474
64
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 5,561 reviews of which 4,905 were positive and 656 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
4,905
656
61
players
8. 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 1,610 reviews of which 1,369 were positive and 241 were negative resulting in a rating of 8.1 out of 10. The game currently holds the #8 spot among the most played aliens games.
8.1
1,369
241
40
players
9. 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 3,773 reviews of which 3,577 were positive and 196 were negative resulting in an impressive rating of 9.1 out of 10. The game currently holds the #9 spot among the most played aliens games.
9.1
3,577
196
36
players
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 10,790 reviews of which 9,966 were positive and 824 were negative resulting in a rating of 9.0 out of 10. The game currently holds the #10 spot among the most played aliens games.
9.0
9,966
824
21
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 30th 2025. Looking for even more deals? Use the search filters to explore a wider range of discounted aliens games.
1. 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 574 reviews of which 428 were positive and 146 were negative resulting in a rating of 7.1 out of 10. Featuring a massive 88% discount, this game currently holds the #1 spot in the best deals for aliens category.
7.1
428
146
-88%
10.00€
1.20€
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 1,003 reviews of which 699 were positive and 304 were negative resulting in a rating of 6.7 out of 10. Thanks to its incredible 88% discount, this game is now the #2 best deal in aliens games.
6.7
699
304
-88%
10.00€
1.20€
3. 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 60,236 reviews of which 56,157 were positive and 4,079 were negative resulting in an impressive rating of 9.2 out of 10. Thanks to its incredible 85% discount, this game is now the #3 best deal in aliens games.
9.2
56,157
4,079
-85%
38.67€
5.80€
4. 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 19,741 reviews of which 17,969 were positive and 1,772 were negative resulting in a rating of 8.9 out of 10. Currently offered at a significant 80% discount, this title has earned the #4 position in the best deals for aliens games.
8.9
17,969
1,772
-80%
14.99€
2.99€
5. 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 24,088 reviews of which 19,247 were positive and 4,841 were negative resulting in a rating of 7.9 out of 10. Currently offered at a significant 80% discount, this title has earned the #5 position in the best deals for aliens games.
7.9
19,247
4,841
-80%
29.99€
5.99€
6. 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 1,559 reviews of which 1,270 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 #6 position in the best deals for aliens games.
7.8
1,270
289
-80%
5.00€
1.00€
7. 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 11,466 reviews of which 6,992 were positive and 4,474 were negative resulting in a rating of 6.0 out of 10. Currently offered at a significant 80% discount, this title has earned the #7 position in the best deals for aliens games.
6.0
6,992
4,474
-80%
29.99€
5.99€
8. 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 10,006 reviews of which 9,505 were positive and 501 were negative resulting in an impressive rating of 9.2 out of 10. Currently offered at a significant 74% discount, this title has earned the #8 position in the best deals for aliens games.
9.2
9,505
501
-74%
16.50€
4.29€
9. 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 2,623 reviews of which 2,301 were positive and 322 were negative resulting in a rating of 8.4 out of 10. Currently offered at a significant 67% discount, this title has earned the #9 position in the best deals for aliens games.
8.4
2,301
322
-67%
4.97€
1.64€
10. 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 5,561 reviews of which 4,905 were positive and 656 were negative resulting in a rating of 8.5 out of 10. Currently offered at a significant 65% discount, this title has earned the #10 position in the best deals for aliens games.
8.5
4,905
656
-65%
30.34€
10.62€
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 30th 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 1,599 reviews of which 1,523 were positive and 76 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
1,523
76
1
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 368 reviews of which 343 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
343
25
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 1,057 reviews of which 933 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
933
124