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.
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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, 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. *
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.
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 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.
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".