Top similar games like Astronaut Assault:

Hostile Mars is a Factory-Building game focused on Combat! Explore an open world and discover new tech, unlocking powerful weapons and structures. Create efficient supply chains using delivery bots. Salvage destroyed enemies for resources. Design your base to withstand increasing waves of enemies!

Small game in Tower Defence genre with elements of shooter. Kill Replicators all by yourself or make perfect defence with different turrets.

Choose a planet, build your base, equip powerful weapons, deploy troops, and defend your fortress in this action-packed block-builder!

Go back in time to a war-torn medieval era with a vast arsenal of modern weapons, change the course of history, and save the future in this epic action/strategy sandbox. Build your kingdom, grab a gun, and lead an army of thousands into massive, real-time simulated battles — solo or in co-op.

Obelisk is a turn-based tower defence game in which you take on the role of space astronaut Allen as he fights monsters and guards the Energy Obelisk on this planet.

Farm, Build, Defend, in the Galaxy's only Arcade-Tower-Defense.

Technitive is a first-person open world tower defense set in 2043, where you advance from primitive tools to machines and modern weapons. A colonization attempt is set on an Earth-like planet after an extinction threat to Earth. Colonize the planet and save mankind!

Defend on your kitchen counter in this thrilling tower defence meets third-person shooter! Battle waves of insects, from pesky ants to colossal beetles. Earn cash for kills, upgrade weapons, and fortify with powerful turrets. Can you protect the sugar cube?

A tower-defence-like colony sim where you must extract resources from the land and produce fuel to escape the planet. Expand across each map researching various structures, creatively avoiding or engaging with local creatures to take their precious crystals. Research, Build, Expand, Extract!

Hostile Mars is a factory-building game focused on combat! Explore an open world and discover new tech to unlock powerful weapons and structures. Create efficient supply chains using delivery bots. Salvage destroyed enemies for resources. Design your base to withstand increasing waves of enemies!

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.

Get ready to rethink all your defense strategies! Build barricades to stop monsters, or lure them into a maze and attack. A variety of stages that change each time depending on how you play them.

IT HAS GONE ROGUE You are sent to an hostile Space-Station with the mission to stop an AI-Super-Computer that has gone rogue!

A sandbox, space-exploration survival game where you can build bases and explore other planets and moons around the star Craterous.

Strategically build impenetrable towers & defenses, to endure the endless foes that emerge in the shroud of night. Each passing day is an opportunity to grow stronger. so take what you need from the environment. Gather, Craft, Survive, Defend, Thrive!

Space debris is out of control! Craft a station to take out the trash in this construction roguelite mashup.

A Co-Op FPS game with base building in a post-apocalyptic world. Craft weapons, build barricades and automated turrets, unlock new gear and items for visual customization and kill all savages and mutants trying to destroy the remnants of human civilization.

Set in the merciless blizzards of a far off planet, The Last Defender is a cooperative third-person survival shooter with strategic defence and crafting elements. Nurture your colonists, build your defences and prepare for an enemy that adapts and learns your weaknesses. No wave is ever the same.

SpaceMine is a third-person tower defence game where your mission is to defend your mining operation by building towers and barriers to hold off waves of local fauna and collect enough resources to meet the company's quota.

Astra Sentinel is a real-time strategy game in which you must defend planetary systems from endless hordes of aliens. Reconquer planets, build on their surface and prepare to counterattack. Will you be able to recover the control of the galaxy?

An open-ended factory management game with RTS and tower defense elements.

Stars End is a multiplayer sci-fi survival game set hundreds of years in the future in a star system colonized by humans. Come and join us for crafting, construction, missions and PvP on the wild frontier...

Cryowakers is an exploration and survival game that takes place in a randomly-generated futuristic world. Play solo or with seven other players to explore, survive, build, and fight to uncover the truth behind the cryosleep experiments.

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!

A tower defense game.In the wave after wave of enemy attacks like a tide, constantly configure defense tower ties, player talents, props and equipment, build a powerful defense position, and eliminate the enemy before they fill the map!

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!

Unionatic is an impressive game that combines strategy and village building. Construct your village, manage resources, and plan strategies while also experiencing thrilling TPS gameplay, controlling your character and engaging in intense battles against enemies!

A procedurally generated sandbox survival game with RTS elements.

Constructopia is a survival tower-defense game where you can design, build and craft your towers! Gather resources by hand or build systems aimed at automating your production! Build and maintain bases, design defense contraptions and use them to aid you in your adventure against the trolls!

Control two characters simultaneously! Survive, gather, collect upgrades, fight all sizes of one-eyed Martians, build defensible outposts and conquer Mars, in this glorious mix between roguelite and tower defense.

An RTS/Action 3rd person shooter that lets players take on hordes of enemies while defending their base. Use strategy, unique abilities, tech research and combat skills to be victorious. (Currently in Pre-Alpha stage, 1 developer team)