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
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. *
Infested Planet
Command a team of 5 elite soldiers against an alien horde of 100,000. Surrounded on all sides, you must outmaneuver and outsmart the enemy.
Signs of Life
Signs of Life is a sci-fi survival sandbox platformer with a combination of procedurally generated and hand-crafted content. You'll explore mysterious locations, Mine blocks for resources, and meet strange (and some familiar) creatures, some of which don't even want to kill you and eat your corpse.
UFO: Afterlight
The story is situated on Mars. It starts where UFO: Aftermath left off and runs simultaneously with UFO: Aftershock. While the Laputans on Earth are fighting Wargots and Starghosts and finding out what caused the destruction of their home planet, a small colony on Mars is trying to survive and flourish.
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...
Alien Rage - Unlimited
Unleash a fury of powerful weapons as you blast your way through armies of Alien forces hell-bent on taking you down! Battle through 14 intense levels and prepare to face a barrage of beastly-sized bosses that will test your every skill. Each of your 10 weapons comes with two firing modes and you’ll need all of them!
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.
The Bureau: XCOM Declassified
The year is 1962 and the Cold War has the nation gripped by fear. A top-secret government unit called The Bureau begins investigating a series of mysterious attacks by an enemy more powerful than communism.
Saints Row IV: Re-Elected
Experience the insane antics of Saints Row IV. The Saints have gone from the Penthouse to the White House - but Earth has been invaded and it’s up to you to save it with an arsenal of superpowers and strange weapons, in the wildest open world game ever.
The Apogee Throwback Pack
The Apogee Throwback Pack is a collection of four classic Apogee Software titles all in one kick ass package. Blast your way across the galaxy as British Special Agent Blake Stone in "Aliens of Gold" and "Planet Strike", then take on an ancient evil menace as the H.U.N.T in "Rise of the Triad".
Sanctum 2
Sanctum 2 is the sequel to the world’s first Tower Defense/FPS hybrid game. Pick from four unique character classes and embark on a mission to protect the oxygen-producing Cores from hordes of deadly aliens who are threatened by their existence.
Super Sanctum TD
Super Sanctum TD is a retro-styled Tower Defense game that focuses on strategy, customization and replayability. Build advanced mazes and construct powerful towers to prevent alien hordes from reaching the Core!
Surgeon Simulator
Surgeon Simulator is an over-the-top operation sim, stitching together pitch-black humour with life-saving surgery. Become Dr. Burke, a would-be surgeon with a less than conventional toolkit, as he performs procedures on patients including the Heavy from TF2! ...is that a hammer?
Another World – 20th Anniversary Edition
Also known as Out Of This World™, Another World is a pioneer action/platformer that released across more than a dozen platforms since its debut in 1991. Along the years, Another World™ has attained cult status among critics and sophisticated gamers alike.
Weird Worlds: Return to Infinite Space
Weird Worlds: Return to Infinite Space is a hybrid roguelike game of space exploration, adventure and starship combat.
Incredipede
Grow arms and legs to transform into a snake, spider, butterfly, or fifty-legged horror - anything you can imagine. Control your creations in a fumblecore dash to solve each puzzle. Learn to swing through the trees, climb sheer cliffs, or even fly.
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!
Sword of the Stars: The Pit
A fun, fast, light-hearted, turn-based RPG, where the tradition of old school dungeon-diving games meets the sci-fi Sword of the Stars universe!
Natural Selection 2
A fast paced multiplayer shooter that pits aliens against humans in a strategic and action-packed struggle for survival!
XCOM: Enemy Unknown
The XCOM: Enemy Unknown - Slingshot Pack is Now Available!
ENDLESS™ Space - Definitive Edition
ENDLESS™ Space is a turn-based 4X strategy game, covering the space colonization age in the Endless universe, where you can control every aspect of your civilization as you strive for galactic domination.
Alien Shooter 2 Conscription
The Great War has begun! The world population capable of functioning is mobilized to serve in the army and the outcome depends on you!
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.
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