Top similar games like Planetary Defense: An Orbital Turret Defense System:

Mow down the alien hordes, scout for resources and survive. Dreadnought is a mix of Action Tower Defense Survival and Shoot 'Em Up Bullet Hell where you control the ships turrets & defend against waves of enemies. Choose your weapons, upgrade your ship & brace yourself, the horde is coming.

C6: Frontlines is a bullet hell co-op roguelike where only YOU (and your friends) can bring the Azapall galaxy to peace. Wield 30+ weapons and gadgets of mass destruction to even the playing field, wave after wave, against a seemingly endless onslaught of evil!

Command Captain Hope's ship in this strategic 2D space game. Build structures, deploy fleets, and manage resources to defend the Citadel against waves of enemies. Combine direct ship combat, tower defense, and base building as you face epic boss battles.

WarShape is a "Top Down Shooter" where you face growing hordes of enemies. As you progress, the weapons and defenses of everyone in the arena evolve, starting from primitive equipment to technological weapons. Build, find weapons, recruit allies and buy upgrades to survive the attacks.

Control the ball with gravity and smash through endless hordes! Collect weapons and skills, power up to the max, and survive the onslaught!

Neon Fighter is a tiny arcade game packed with lasers and explosions, in which every few seconds you are forced to switch weapons automatically, making you have to adapt quickly to the new situation and re-evaluate your perspective.

Blast your way through waves of space debris in order to reach what is waiting for you on the other side. Find your fighting style with multiple unlockable ships in this fast paced space adventure!

Defender's Squad is a sci-fi vertical scrolling shooter 2D that combines 7 different levels. Play Solo and pick one of the 3 ships to kill enemies and save the earth from aliens.

You've been dropped into enemy space. Weave your Starfighter between alien spaceships, lasers, asteroids and bombs destroying as many as you can and collecting valuable coins and powerups as you go.

XenoFeud is an insane top-down twin-stick arcade alien shooter, where you must survive hordes of alien intruders while defending a mysterious object in space.

Fuel is life. Survive relentless alien swarms in this fast-paced arcade shooter featuring auto-targeting weapons, deadly terrain navigation, and score-chasing chaos.

AREA WARS™ is a fast-paced 2D omnidirectional shooter where you battle enemies from every direction in a constantly changing enclosed area. Defeated enemies trigger chain explosions that engulf nearby foes and boost your score multiplier. Built for short, repeatable runs with score-focused gameplay.

Scrap Bastion is a strategy tower defense game where you manage your city, equipping it to survive the waves of mutant creatures, testing your planning and decision making capacities at every turn. Watch out, as time is crucial to win!

This is a rogue-like top-down shooter where you control a spaceship that is sent out to explore the caves on the Moon. Once you enter the caves, you find out that there are enemies. It is up to you to survive against them while also trying to find the path down to the next level of the caves.

Fast top-down space shooter with varied missions, relentless enemies, powerful ship upgrades, and most importantly, fire.

Dwarf Star: 16 bit inspired game where mercenary go shoot shoot on evil alien guys who were accidentally fabricated by the government. Top down space shooter with a mission based structure. However, you can do these missions in plenty of different orders with different amounts of upgrades.

Oh no! Anxiety Bot has found himself in a meteor field! Try to help him survive as long as possible in this cozy, laid back arcade shooter. How long can you keep him safe?

A broke bounty hunter. A sarcastic robot. 1,000,000 credit debt. Star Scrap is a chaotic twin stick space roguelite. Blast through increasingly difficult waves of enemies to pay it off.

Darkship Echoes is a tense, atmospheric sci-fi top-down shooter where you pilot a remote drone through a dark, derelict space station, using radar to scan for threats, fight rogue machines, and scavenge supplies to survive.

Strategize your base to build and defend off waves of enemies in an on going battle. Plan, Attack, Defend and Grow! In the stratigic tower defense shooter.

This is a retro space shooting game, where you only fight against the strongest enemy. There are 15 unique bosses in the game, and players need to use different weapons and strategies to defeat them. Dedicated to you who are both challengers and retro game lovers.

Space Ace is a 2D top-down shooter that focuses on upgrading your ship to fight through levels of Bosses and smaller enemies. Play with keyboard + mouse or Xbox controller.

Kuiper belt survivor is an arcade style bullet heaven, where every run is endless. It brings a unique spin to the bullet heaven genre by making every part of the players weapon arsenal customizable with well over 10,000 unique weapons to build, and unique stats for every enemy.

Repel extraterrestrial entities!

Stellar Space is a new take on a classic arcade game with a modern, rogue-like, form for new players to enjoy!

"Astro Wings: Space War" is a retro style, exciting and authentic bullet hell, space shooting game.This game brings you the thrill, urgency and fantastic experience of an authentic arcade shooting game.

Galaxy Frame is a space Roguelite game players control their aircraft to survive the attacks of alien insects. By understanding the characteristics of aircraft, skills, and props, players can build their own decks and challenge stronger enemies. Arcade mode to challenge the world leaderboard.

It’s time to cluck around and find out. Gear up and pull on the helmets of the Battle Roosters, a hotshot space brigade of poultry with panache. In this quirky, roguelike, bullet hell adventure you’ll combine weapons, upgrades and killer strategies to recover space’s best taco ingredients. Bwark!

Astragene is a roguelite shooter where you will have to survive each level facing hordes of aliens. Improve your abilities, choose new upgrades, and create reactions by generating combinations of powerful elements. Each game will be different, will you be able to adapt?

Merge Mutants is a fast-paced top-down survival shooter where hostile scientists try to keep you locked up. Synthesize their remains into healing, abilities, and loyal mutants, then merge matching units into bigger and more powerful ones. Break out of the lab or die trying.

In Astrum Vanguard, a 2D horde-survival with bullet hell components, you pilot and upgrade your spaceship to defeat countless alien creatures. Survive the endless onslaught in the cosmic battlefield!

A bullet-hell planet defence game where you orbit, shoot, and upgrade your way through escalating waves of asteroids and brutal bosses.

Fly around, mine resources, expand your ship, build weapons and fight off aliens!

An unknown signal pulses across the edges of deep space. Drive, shoot. Dodge, destroy!

AstroWars is a top down 2d shooter with monsters and a blue gun. Earn score by killing monsters and try to beat your top score.

Defend your Lifenode from waves of Scrollers, Trolls, and Doomscrollers in this chaotic 2D arena shooter. Upgrade, survive, and beat the algorithm.