
Space Hulk: Ascension
Action
Space Hulk: Ascension is a 3D, digital, turn based, strategy game, which re-interprets the classic board game experience, and adds new RPG style mechanics, new weapons and missions, new enemy types, 3 playable chapters and loads of other new features to the single player experience.

UFO: Aftermath
Singleplayer
UFO: Aftermath is a 3D isometric, tactical strategy game with a rich and compelling sci fi story.

UFO2: Extraterrestrials
Singleplayer
Are strategy games with strong RPG elements your cup of tea? Did you enjoy games like Xcom: UFO Defence, the Fallout series, the Civilization series, the Heroes of Might and magic? And now you are looking for something new to satisfy your craving for turn-based fun?

UFO: Aftershock
Singleplayer
UFO: Aftershock is a combination of tactical squad combat and global strategy that enhances and expands upon its prequel, UFO: Aftermath.

UFO: Afterlight
Indie
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.

X-COM: UFO Defense
Retro
You are in control of X-COM: an organization formed by the world's governments to fight the ever-increasing alien menace.

UFO: Extraterrestrials Platinum
Indie
UFO: Extraterrestrials PLATINUM is a new edition that includes a number of enhancements that give the player a new perspective on the classic game: new alien species, heavy weapon platforms, heavy mortar, crash site bombardment, unique items, UFO swarms and configurability.

XCOM: Enemy Unknown
Action
The XCOM: Enemy Unknown - Slingshot Pack is Now Available!

You struck gold
Casual
Stranded on a mining planet, your escape hinges on quarrying gold. Solve challenging puzzles by using unique card abilities to uncover riches and escape in this strategic, card-based puzzle game!

X-COM: Enforcer
Action
X-COM: Earth's top-secret eXtraterrestrial COMbat unit The Place: America - early 21st century The Mission: Eradicate the extraterrestrials Alien forces have invaded Earth and are terrorizing the population.

X-COM: Terror From the Deep
Retro
The war continues... X-COM: UFO Defense brought you to a galactic battlefield. X-COM: Terror from the Deep brings the alien terror into a totally new dimension.Seeking to take advantage of a weakened Earth, X-COM's deep space foes unexpectedly change strategy and launch a powerful second front against planet Earth.

Xenonauts 2
Action
Wage a global war of resistance against an alien invasion. Command turn-based tactical battles, build a network of covert bases, directly control your fighter wings, and achieve strategic victory in a simulation of asymmetric warfare against a technologically superior foe.

X-COM: Interceptor
Singleplayer
They're back...only this time the heinous aliens are out to destroy Earth and rule the new frontier. As X-COM commander, it's your sole duty to protect humanity and the prized mining operations in outer space.

Xenowars
2D
This is a turn-based strategy/RPG game set in the stars. In the early stages, you will recruit a team of experts on Earth for exploring a distant alien homeworld, choosing between scientists, mutants, and soldiers. Scour the planet for lost alien technology and uncover the secrets to Earth’s doom.

Defense of the Earth
2D
Gather a task force of the best fighters earth has to offer and research technology to defend against the alien invaders. You have to lead your squad through various grid- and turn-based battles. Between missions, you plan your next moves, manage your crew's abilities and unify humankind.

Space Survival
Indie
This is a post-apocalyptic survival game that combines tower defense, survival, strategy, and random events. The game atmosphere is fun, and there are many wonderful props waiting for you to discover. Every decision you make will affect subsequent development. Live by your wisdom,

Alien Earth
Action
The evil Raksha have taken over the Earth. They hunt humans for sport - and you're next! Can the hunted become the hunter....?

宇宙探索
Casual
宇宙探索,在浩瀚的宇宙里,人类正在探索了解宇宙,以获得对宇宙的更多认知,促进人类的发展强大,抵御未知宇宙生物的侵略,然而,外星人得知这一消息 ......

UFO穿越 (UFO Cross)
Indie
Aliens cross the stars and attack the earth!Hunting humans... Are you willing to shoulder the burden of saving the world?Rise up and fight!

银河战争一(Galactic Wars One)
Indie
A tower defense strategy science fiction game, in the future era, when aliens invade the solar system, players need to build various turrets to resist alien attacks and guard the Milky Way and solar system.

Astro Mining
Indie
Build a small mining colony in deep space and defend it from alien invaders as you extract precious minerals from asteroids in Astro Mining.

Xenonauts
Indie
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.

UFHO2
Indie
Play an alien navigating a maze of hexagons in this competitive mix between strategy and board game. Plan your next turn, think fast, act faster, and outmanoeuvre your opponents by predicting their moves. UFHO2 is strategy at its finest.

Interplanetary: Enhanced Edition
Indie
In this turn-based strategic artillery game, players wage interplanetary wars by developing their home planets and firing massive barrages through the unpredictable gravity fields of the solar system.

End War RTS - Alien invasion
Indie
A pixel style RTS type of modern war game, with the theme of alien invasion, real-time strategy game

Universe Horizon
Indie
An idle incremental game where you decide to travel across the whole Universe. Embark on this journey in your little ship and get as far away as possible from Earth, gathering resources and upgrading your spaceship along the way.

Alien Shooter: Revisited
Indie
Crowds of blood-thirsty monsters, crawling from every corner of the secret research base. Gloomy basements and modern labs, darkness changing into blazing bulbs. The only usual thing is: you're in a bad place alone, and there's no one to help you!

Space Squadron
Indie
Earth's last hope is in your hands, take control of the lone spaceship and protect Earth from alien swarms. Your goal will be quite challenging as you will have to save the Universe from its evil enemies.

UFO Online: Invasion
Action
UFO Online: Invasion is a turn-based tactical combat MMORPG set in the post-apocalyptic world

Alien Insanity
Indie
Aliens have invaded Earth and these thing are weird. Mechanical steam-powered shells... bipedal robots... flying eyeballs drones... Can this all be real? The aim of each level is simple: Kill all the aliens - then find the exit. 24 mind-bending levels! Create and share mods with the inbuilt level editor.

UFO 50
Indie
UFO 50 is a collection of 50 single and multiplayer games that span a variety of genres, from platformers and shoot 'em ups to puzzle games, roguelites, and RPGs. Our goal is to combine a familiar 8-bit aesthetic with new ideas and modern game design.

Aliens Are Rude!
Indie
The robots were dancing happily away until the aliens came and crashed the party! Engage in space combat, traverse planets, learn abilities from aliens, upgrade with perks and titles, strategize, dodge, shoot, and reclaim the nebulous!

Alien Shooter TD
Indie
Innovative Tower Defense inspired by legendary Alien Shooter series! The game was created in keeping with the best traditions of Sigma`s games, no concessions of any kind - everything is just like in real life!

Outer Frontier
Casual
Grow crops and fight giant birds, mine precious materials while avoiding sink holes. Keep your societies needs met before unrest breaks out. And finally end the war by tracking down the enemy leader.

Inbound UFO
Indie
With a style inspired by the RTS games from early 2000's, a new tower defense combines in a unique way action, tactics, replay value and fun. They are here! Choose your targets, upgrade, replay, discover your enemies and your tactical skills.

Out There: Ω Edition
Indie
Out There is an award-winning space exploration game blending roguelike, resource management and interactive fiction.

Alien Shooter - Last Hope
Indie
New chapter in history of the legendary game, including 10 story missions.

Alien Prop Hunt
Casual
Jump into an exciting new take on a classic concept! Alien Prop Hunt is an action packed team-based game where one team desperately tries to hide in plain sight, while the other relentlessly searches through environments to find them!

Alien Shooter 2 - New Era
Action
A desert, an abandoned city, cramped underground corridors of MAGMAs research centers, and for hundreds of kilometers around there is only darkness and thousands of monsters coming from all sides. You have only two options - to achieve your goal or die.

Alien Time
Indie
Alien Time - Tower Defense game in which the player sets up defensive towers to repel waves of opponents that get stronger each time and force the player to use new options for defensive placement tactics.

Rescue Team: Danger from Outer Space!
Casual
Stop an alien threat from wreaking untold devastation on Earth! After a meteor strikes Florida and releases strange spores, weird plants begin to grow and destroy entire cities! Only the Rescue Team has the skills to deal with this menace from outer space!

Extra Terrestrial Nation
Indie
In the year 2045 scientists discover a new planet that has extraterrestrial life on it, which they brought back to Earth to study. It wasn't long before they mutated and escaped into the city. The only safe place left is on the outskirts of town, can Nicole and Rocky make it safely out of town?

Aliens vs. Ghosts
Action
Use Nukes, Electricity, Freeze Rays, Heat Rays and powerful Minions to defeat all the Ghosts in this wave-based first person shooter! Only Ghosts stand in the way of your invasion of Earth.

UFO
Casual
About, A Boy's Summer Dream.

The Outer Worlds: Spacer's Choice Edition
Action
The Outer Worlds: Spacer’s Choice Edition is the ultimate way to play the award-winning RPG from Obsidian Entertainment and Private Division. Including the base game and all DLC, this remastered masterpiece is the absolute best version of The Outer Worlds.

Aliens&Asteroids
Indie
Inspired by the classic arcade games Aliens & Asteroids is an active and fast space shoot 'em up with a lot of different enemies and bosses. Abilities, Items and Upgrades make for a different experience every time.

Xenoterrestrial
Action
Time and date are not important. Aliens have boarded a military vessel deep in space. Little do they know, #T217, a combat clone onboard the dreadnought, has been waiting for them. Use a wealth of weapons and mechanics to eliminate them with expert precision.

Outwars
Action
As a Dreadnaut soldier, you will lead a team of space troopers against an alien insect force in a planet by planet battle to save the universe. You are the best we have. You are one mean space marine. Succeed in your mission objectives and we all survive. Fail...and you condemn us all.

Random Heroes: Gold Edition
Action
Random Heroes is an action-packed 2D side-scroller platformer. Blast through this action-adventure hero shooter inspired by classic retro games, and stop an alien invasion by teaming up with a bunch of, Random Heroes.

UFO Sightings Simulator
Indie
UFO Sightings Simulator is a survival mystery game about shooting photos of paranormal phenomena. Take photos, sell them and buy rations, tools, decorations and more, while discovering the island(s)!