Top similar games like Astronaut Assault:
Astronaut Assault $9.99
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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SENTRY$19.99
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.
Stellarcraft$9.99
Stellarcraft is an exciting sci-fi tower defense game where you explore planets, gather resources, and fend off enemies—solo or in 4-player co-op. 🚀
Scorpion Overdrive$0.99
Descend to an alien planet where you will steal the planets most valuable resource, while hordes of giant alien bugs sting, stab, claw and shock you to no end. You must hold them back from destroying the equipment and somehow stay alive to enjoy a nice payday.
Galactic Sanctuaries$3.99
Protect the lighthouse, destroy nests and complete tasks.
Starmancer$14.99
From a small 2-man team comes a unique space station management sim. Take on the role of an A.I commanding a lost space ark. Try not to let your crew run amok and wreck the place.
Space Haven$22.99
Embark on a space voyage with your ragtag crew of civilians in search of a new home. Build spaceships tile by tile, create optimal gas conditions, manage the needs and moods of their crew, encounter other space-faring groups, and explore the universe in this spaceship colony simulation.
Red Planet Rampart$11.99
You are deployed to the desolate red planet to reforge humanity's hope. With no hospitable atmosphere, no nurturing water sources, only relentless storms, unknown alien creatures, you must use wit and determination to survive on this alien land and build a Mars base of your own.
NecroCity: PrologueFREE
NecroCity: Prologue is just part of the gameplay that awaits you in the full version of the game. Take on the role of the young Prince of Undead, trying to prove himself in the world of the Undead Kingdom. Push back the hordes of monsters and build your fortress! 🔥
DOTFI$1.99
Do you have what it takes to defend what is yours? This is not a typical tower defense game where the troops do all the work. This is a hybrid FPS/TPS tower defense game which you take over the control to defend your island.
FortressCraft Evolved!$12.99
FortressCraft Evolved is a unique blend of Voxel Landscapes, Tower Defense, Crafting, Logistics, Exploration, Combat and Assembly lines. Players begin by crash-landing on a strange alien world, left with only a small handful of starting machines.
ASTROSWARM$9.99
Fight for your life against the incoming swarm of zombified astronauts in ASTROSWARM! Use a variety of weapons, turrets, and power-ups to survive!
Playground Mayhem$3.99
Defend your base solo or with friends against endless waves of foes using your weapons and turrets. Are you up for the challenge?
Intern Pursuit Game$2.99
A Third-Person Tower Defense game in which you are an Intern sucked through a portal who now must defend the objective from aliens.
Lumencraft$19.99
Lumencraft is a unique combination of a top-down, rogue-like shooter and base building with tower defense elements. Dig and light up dark halls of a fully destructible environment on procedurally generated maps and campaign levels to find precious Lumen - humanity's only chance for survival.
Moon Defence$8.99
Aiming is uneasy, movements are slow, resources are hard to earn. Stop farming infinite vegetables, try to acquire some more jigowatts in empty space, where no one can hear your scream. Moon is a harsh mistress.
IDUN - Frontline Survival$14.99
A defense RTS where you can move turrets at will. Extract resources, upgrade technology, and defend against enemy swarms in a gripping space campaign. Hold the line, set up your turrets, and brace for screen-filling hordes!
Survive In Strange World$4.99
Action adventure strategy game with tower defense, in a fantasy world, use your own combat skills, weapons, and the power of your partners to survive. Face the ultimate fate with your unique combat style.
Stellarcraft The PrologueFREE
Stellarcraft is a thrilling sci-fi tower defense game that delves deep into the vastness of the universe and offers players the opportunity to explore planets, collect resources and defend themselves against numerous threats.
Fragmented$9.99
Stranded in a hostile alien world, you must fight to survive. Hunt, harvest, craft, advance skills, and build using local resources along with technology from your voyage.
Live Day 活着的日子$4.99
This is a game that combines construction, shooting, and tower defense with a third person apocalyptic theme. In the apocalyptic environment, let players build apocalyptic strongholds that are suitable for their survival.
World Crafter TD: PrologueFREE
A highly addictive survival crafting tower defense game! Gather, craft, build turrets, shoot guns, and expand the land to defend against waves of enemies! The prologue for the full game, World Crafter TD!
IDUN Prologue - Frontline SurvivalFREE
Step into the arena with IDUN: Prologue, a thrilling slice of our full-length defense RTS where real-time strategy meets rogue-lite chaos. Fight your way through unique mission objectives with overwhelming swarms of enemies.
World Crafter TD$14.99
A highly addictive survival crafting tower defense game! Gather, craft, build turrets, shoot guns, and expand the land to defend against waves of enemies in World Crafter TD!
All Noobs must die$2.99
A place where wishes come true! You just need to protect the obsidian portal from zombies. Mine resources with your pickaxe, build traps, and put them to use — let them grind the zombies into a juicy green porridge! Funny meme endings!
Null Reference ExceptionFREE
Become a future AI and delve into 3D bullet hell action in an advanced lab. Combine various modules, repeat combat training, enhance stats with research points, and earn achievements to develop your unique combat style. Enjoy overcoming waves of enemies and defeating bosses within time limits.
Puropu Defense Squad$9.99
Defend your world as sentient Props in Puropu Defense Squad! Build, upgrade, and evolve your heroes to crush waves of filthy humans worldwide. Dive into a unique mix of third-person action and tower defense—solo or with friends—in an endlessly replayable co-op campaign!
Triton Survival$14.99
Triton Survival is an open world survival game about exploration, construction, engineering, and fighting on planets. Embark on this interstellar adventure and conquer the galaxy. Are you ready?
Tavernacle!$11.99
Grab your hammers and start to craft in this co-op Tavern Defense for one to four players. As a team of Dwarves, you must gather supplies and build towers to protect your beloved brewery. Learn to cooperate to achieve victory in this chaotic multiplayer game!
Alien Hallway$4.99
Players measure stamina with a never-ending stream of green creatures within the borders of a special military mission.
Bandit the gameFREE
Bandit the game is an RPG-survival with an open world and elements of tower defense, where you can build own base, gang and vehicle.
Armored$1.99
It's time for you to prove yourself in the management of armored vehicles. You have to perform many operations from liberating the territory to escorting VIP and battling against enemy armored vehicles.
Len's Island$29.99
Discover, survive, and thrive in Len’s Island, where intense dungeon crawling meets open-world action RPG. Master skill-based combat, craft powerful items, build and defend your homestead, and find solace in farming. Your journey, your destiny.
Dig or Die$11.99
Crash land on a hostile planet where you'll have to build the strongest defenses if you wish to live to escape from it. But be warned... this planet is merciless. Build strong, and smart; else physics may flood or destroy your only hopes of survival.
Graveyard Caretaker$7.99
A third person shooter and tower defence game.
Kronos$1.99
All units, heed my orders! The enemy is approaching! Call for reinforcements! Set up turrets! And someone bring me a new gun! And quickly! Now, all fighters, time is short, everyone to Kronos! Go, go, go!
Planetaries$19.99
Experience a vast Sci-fi open-world survival TD game set on a distant planet deep in the universe. Craft, build, mine, trade, explore, and survive in this alien world. Collect Data and defend against waves of enemies seeking to banish you. Enjoy the adventure in Singleplayer or Multiplayer.
The Gears: Factory$7.99
[The Gears: Factory] is a third-person 3D factory-building game where the player's main goal is to build automated systems by mining minerals and producing industrial units.
ArcaneOutpost$4.99
A strategy game that combines MOBA and Tower Defence, You would control guardians with different skills，building your outpost to fend off enemy attacks.
The Matchless Kungfu$19.99
The Matchless Kungfu is an open world sandbox RPG game based on a WuXia background. You can play any martial arts role you imagine in this wild world. Travel through the great wilderness, or be the leader of the group. The most important thing is, build your own story and live the experience!
The Last Drop$4.99
The Last Drop is a pixel art top-down shooter where you control the last water droplet on Earth. Battle waves of enemies with unique weapons, customize the map, and compete on the online leaderboard.
Endless Apocalypse$4.99
Endless Apocalypse is an exhilarating shooter game that immerses you in an infinite adventure across diverse levels. Encounter a captivating array of enemies and formidable bosses, challenging your reflexes and strategic thinking for triumphant victories.
Loot Express Delivery Service$9.99
Embark on an adventure with Loot Express Delivery Service, a 2D pixel art game. As the commander, your goal is to retrieve valuable items from a distant planet. Utilize your skills and strategy to complete missions and guide your company to prosperity.
Space Engineers$19.99
Space Engineers is a sandbox game about engineering, construction, exploration and survival in space and on planets. Players build space ships, space stations, planetary outposts of various sizes and uses, pilot ships and travel through space to explore planets and gather resources to survive.
The Guardian Stone$14.99
The Guardian Stone is a online third person Action Tower Defense Game with Rpg elements and mulitplayer. Set in the fantasy world of Elrone, You play as a hero protecting the realm from the forces of evil.
Bee Island$9.99
Take control of the hive and protect it from enemies. Build factories and defence, research technologies and, if necessary, use nuclear weapons, but do not let the enemies harm the queen!
Make It In Time$4.99
Alicia Hudson and her fellow survivors must find a way to escape a dying planet after their spaceship crashes. This third-person shooter action game features RPG elements, a variety of weapons, fast-paced combat, massive enemy waves, challenging defend the city missions & much more..
Parabolus Two$19.99
Shoot your way across the galaxy in this thrilling adventure! It’s the sci-fi shooter which blends old school game mechanics with modern story driven cinematic experiences. Unlock the mystery of strange events all over the Milky Way and find out who (or what) is behind them.
Planetary Defense: An Orbital Turret Defense System$1.99
2D space shooter and turret defense come together to create the Planetary Defense System this world needs! Shoot down asteroids and aliens and survive the bosses in this arcade like game featuring customizable satellites, projectiles, and upgradable Cannon and Planet Shield systems.
PsychFREE
Play as Psych, while he escapes from a research facility run by evil slugs as they attempt to harvest him for his psychic powers. Face the evil slugs and survive the lab! Watch_out_for_Failed_Experiment
GeadowsFREE
Another bad dream? Another bad memory? Fight against your past, defeat hundreds of robots sent by GEA, the artificial intelligence that stole everything from you and condemn you to your present. Welcome to Geadows, a third person shooter roguelike. Do you accept the challenge?
Starship Destroyer$0.99
A sci-fi space vehicle combat game, where the player must defend their capital ship from being destroyed, while attempting to destroy the alien force's own capital ship!