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
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.
Warp
Warp™ is a strategic stealth-action puzzler where gamers play as Zero, a loveable yet lethal, little orange alien with a big score to settle. Abducted by a villainous General from his home world and taken to an underwater research facility, Zero must plan his ultimate escape by relying on his arsenal of special abilities.
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.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 16th 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 177 peak concurrent players over the last day.
9.2
55,969
4,077
177
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 10,269 reviews of which 7,867 were positive and 2,402 were negative resulting in a rating of 7.5 out of 10. While seeing 166 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
2,402
166
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 122 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
122
players
4. 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 #4 spot among the most played aliens games.
9.2
9,488
499
89
players
5. 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. The game currently holds the #5 spot among the most played aliens games.
8.5
4,802
638
72
players
6. 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 #6 spot among the most played aliens games.
8.2
1,352
233
62
players
7. 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 #7 spot among the most played aliens games.
8.9
17,899
1,774
50
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
38
players
9. 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 10,772 reviews of which 9,950 were positive and 822 were negative resulting in a rating of 9.0 out of 10. The game currently holds the #9 spot among the most played aliens games.
9.0
9,950
822
27
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
27
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 16th 2025. Looking for even more deals? Use the search filters to explore a wider range of discounted aliens games.
1. 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. Featuring a massive 90% discount, this game currently holds the #1 spot in the best deals for aliens category.
6.7
698
304
-90%
9.99€
0.99€
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 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 #2 best deal in aliens games.
7.1
427
146
-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 60,046 reviews of which 55,969 were positive and 4,077 were negative resulting in an impressive rating of 9.2 out of 10. Thanks to its incredible 87% discount, this game is now the #3 best deal in aliens games.
9.2
55,969
4,077
-87%
40.08€
5.21€
4. 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 #4 position in the best deals for aliens games.
7.8
1,266
289
-80%
5.00€
1.00€
5. 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. Currently offered at a significant 75% discount, this title has earned the #5 position in the best deals for aliens games.
9.1
3,571
196
-75%
4.99€
1.24€
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 888 reviews of which 783 were positive and 105 were negative resulting in a rating of 8.3 out of 10. Currently offered at a significant 75% discount, this title has earned the #6 position in the best deals for aliens games.
8.3
783
105
-75%
4.99€
1.24€
7. 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 #7 position in the best deals for aliens games.
9.2
9,488
499
-73%
16.52€
4.46€
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 1,585 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 57% discount, this title has earned the #8 position in the best deals for aliens games.
8.2
1,352
233
-57%
15.02€
6.46€
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 2,616 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 #9 position in the best deals for aliens games.
8.4
2,294
322
-47%
5.02€
2.66€
10. 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 #10 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 16th 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 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
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 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
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