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Alien Hallway $4.99

115August 19, 2011

Players measure stamina with a never-ending stream of green creatures within the borders of a special military mission.

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Code Arcturus$3.99

?Aug 30, 2020

Code Arcturus is a retro inspired arcade-style action platformer, with aliens, robots, spikes, explosions, and lots of coins. Blast your way through levels, compete for the fastest times on the leaderboards in Speedrun mode, or put your skills to the ultimate test in Nerfed mode

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Astro Mining$2.99

?Sep 03, 2024

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

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Alien Shooter 2 - The Legend$14.99

997Jan 22, 2020

Meet the completely reworked legendary game loved by millions of players worldwide! Alien Shooter 2 - the Legend is an ambitious follow-up to the famous Alien Shooter series.

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The Echoes of Mars$4.99

?May 27, 2024

The Echoes of Mars is a voxel-style tower defence game. Defend your research base on Mars from ancient creatures by strategically placing towers and using advanced tech.

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十字防守(X Defense: Timing TD)$2.99

?Mar 05, 2024

Strategy, timing and fortune: Novel and immersive tower defense game experience!

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SENTRY$19.99

598Mar 25, 2024

SENTRY is an action-defense first person shooter where you defend your spaceship against invading aliens. Plot an escape route through hostile space and battle the enemy across your vessel with the support of traps, turrets and environmental destruction.

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Animal Babysister Fighter : Zombie Coming!$7.99

?May 18, 2022

Zombies and monsters are taking over several planets in the galaxy. As a result, animals are losing their habitats. Your mission is to protect those animals. Use your spaceship to transport the threatened species to shelters on humanity's first star colony!

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CHAOTIC ERA$16.99

?Jul 17, 2024

AT THE LIMITS OF EARTH, AT THE EXTREMITY OF HEAVEN. A REAL-TIME STRATEGY NIGHTMARE.

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Alien Shooter TD$9.99

636Jan 13, 2017

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!

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Ad Astra: Sci-Fi Tower Defense$4.99

?Dec 20, 2024

Lose yourself in an indie solo-dev. treasure that harkens back to arcade classics! All while thumping along to killer retro-inspired beats by Ovani sound. Embark on an epic tower defense adventure against awe-inspiring machine monstrosities, made by a devoted gamer for devoted gamers.

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SpaceBase Power-天基火力$4.99

?Jun 06, 2024

Space-based Fire is a science-fiction bullet-screen shooting game that tells the story of humans battling mysterious mechs. The game provides construction, tower defense, barrage shooting in one game experience.

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Astronaut Assault$9.99

?Oct 29, 2024

Dive into Astronaut Assault, a third-person Sci-Fi tower defense game, and battle against relentless enemy waves in diverse arena settings. Arm yourself with an array of turrets, traps, and gadgets to halt, hinder, and outmaneuver your foes.

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Tactical Rampart$3.99

?Nov 19, 2023

Tactical Rampart is a RPG, survival game in which you will become the defender of a rampart from the attack of zombies in outer space. Using guns and towers, could you successfully defeat them?

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Impossible Target$1.99

?Jul 01, 2020

Impossible target is a challenging sci-fi version of operation. You guide your rocket to the red target on the map without exploding. This game offers extremely challenging levels. Can you win?

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迫降Landing$4.99

?Jan 21, 2025

Our ship has suffered an unknown disaster and has been forced to dock on the side of this planet, and all you have to do is lead us to repair the ship and continue its voyage, however, the danger is getting closer and closer without our knowledge......

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SPACE BATTLE: Humanity$1.99

?Jul 19, 2017

The day has come… Humanity has been attacked by an alien race.You have space bases at your disposal. Use them to launch battleships and take over the alien mothership.

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Survive the Rift$14.99

?Apr 15, 2021

Survive the Rift is a rogue-lite shoot 'em up with procedurally generated levels, unlockable ships, and plenty of items to make each run unique. Inspired by classic 16-bit era scrolling shooters with modern rogue-lite game mechanics.

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Too Angry to Space$4.99

?Aug 08, 2016

Do you miss the times when games were not holding your hand? When they did not forgive mistakes and controls and rules were clear and simple to learn? YES? So you miss the 90s!

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Fate of the World$9.99

391Feb 28, 2011

Fate of the World is a dramatic global strategy game that puts all our futures in your hands. The game features a dramatic set of scenarios based on the latest science covering the next two centuries. You must manage a balancing act of protecting the Earth’s resources and climate versus the needs of an ever-growing world population, who...

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Alien Hallway 2$4.99

124Oct 05, 2017

We're happy to present a new game in the Alien Shooter universe! Get prepared to unique tactical gameplay, lots of monster types and 8 fighter types allowing you create your own style of completing missions and defeating bosses.

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Smith and Winston$9.99

?Aug 27, 2019

Blast through the mysterious ring world with Smith and Winston in this explosive twin-stick shooter! Explore, destroy, and uncover secrets in a vibrant, voxel universe. Fast-paced action and quirky humour await. Are you ready to save the universe, one explosion at a time?

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Into the TIMEVERSE$1.99

?Jul 13, 2020

Into the TIMEVERSE is a hard non forgiving action platformer game. Into the TIMEVERSE is a constant"runner" game that you need to match your color to the appropriate color of the enemy platforms. Expect to die a lot in this game.

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Critical Damage$5.99

?Dec 08, 2020

Fascinating and entertaining space action game.

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Battle for the Droid Station$0.99

?Feb 23, 2022

Battle For The Droid Station is a RPG shooting game now available on Steam. Feel the adrenaline as you run and gun down hundreds of rogue mechs and droids causing mayhem on the space station. Take control of your droid character and try to clear the space station from invading droids and robots.

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银河战争一(Galactic Wars One)$1.6

?Apr 10, 2024

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.

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星旅:前奏 Wandering Planet: Prelude$3.99

?May 02, 2024

Star Trek: Prelude is a space-based game that builds defense towers on earth to defend against alien invaders called Black Ember.

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Galactic Garrison$6.99

?Nov 13, 2024

Galactic Garrison is a sci-fi, turn-based tower defense game where you defend your base from relentless alien waves on Mars. Deploy soldiers, build barricades, and upgrade defenses to withstand attacks. Earn powerful reward cards to gain strategic advantages and outmaneuver your enemies.

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Rogue Invader$9.99

?Dec 15, 2021

1-Bit Roguelite Action Shooter.

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Space Break$1.99

?Aug 12, 2018

Build ships from elements and go to fight. The player can control several different spaceships at the same time (fleet battles). During the battle you can switch ships and different ships can attack different opponents. Choose your ships and tactics for each battle.

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