Top similar games like ExtraGalactica:

Saturn Quest: Blast Effect is a story-driven action adventure game set in the human-less galaxy far far away. Fly, climb, shoot, explore the world and fight the giant bosses in this 8 Bit style Space Opera, full of drama and epic.

Fast-paced vertical scrolling space shooter featuring intense boss battles, challenging enemy waves, and score-driven arcade gameplay.

Explore and uncover the mystery of this enormous spaceship by shooting alien creatures in this Sci-Fi Action/Adventure Metroidvania.

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.

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.

Pilot a momentum-driven ship through the cooled remains of dead star systems. Master a growing arsenal, take on 10+ unique epic bosses, and tackle four sectors your way. The world is seed-generated — build and share your own in the free level editor.

Enjoy this 2D metroidvania-like bullet hell platformer. Jump, dodge and traverse using your jet pack. Find weapons and abilities. Fight bosses and escape an old space station drifting through the cosmos. You are alone, with nothing but a space suit and a gun. Just keep going! Persevere and triumph!

Grab the fate of all life in your hands. Blast your way through the cosmos, destroying monstrous cosmic beasts and the space cultists summoning them, on your path to stopping your mother from unleashing the chaos realm upon the universe, in this sci-fi cosmic horror bullet-hell, STARR RINGER.

Master a modular arsenal and survive a biomechanical nightmare in this intense cinematic shmup. Face grotesque aberrations, unlock achievements, and conquer the hardcore mode. The first level of an expanding saga!

Gana Force is a Horizontal shooter where you'll unleash powerful firepower, skillfully dodge bullets, and utilize the terrain to maneuver and defeat enemies. Game environments include alien cell levels, scorching sun, space battleships, and more. Powerful bosses and bullet hell challenges await you!

A 2D vertical shoot 'em up that lets you upgrade your ship with an insane amount of options. From missiles and pods to specials and shields, you can upgrade every bit of your ship from guns to thrusters.

Brave Soldier: Invasion Of Cyborgs is a pixel art platform game with a lot of action. Help the soldier save the world from the Cyborg Invasion! Good Luck!

The humanity succumbed against the power of a aliens intergalactic empire, but managed to organize and establish a resistance army. Join the rebellious seekers of peace and help them defeat the evil that haunts the Earth.

Top-down shooter action for the Atari Lynx handheld console. WANTED: Hot gun for hire. Travel to several exotic and dangerous places. Discover several exotic and dangerous aliens and kill them. Kill lots. For cash. Buy more weapons and kill again.

In the vast depths of space, lies a man with a dark past. Setting himself apart from that old life, and seeking justice against wrongdoing instead of being the cause of it, Captain Righteous uses the Freedom Fighter, his trusty space fighter to search for and combat the evil Captain Buster!

Play as Captain Grisham, and uncover the secrets of Planet 4-514 in this thrilling prequel to Side Scape!

Experience the thrill of a shmup game like the arcade classics. With just the right amount of story, lots of action, and many, many bullets.

"You're Invading My Space" is a fast paced, space themed, wave survival game where every run is unique. Fight off endless procedurally generated enemy swarms, upgrade and unlock your ships and weapons, and push your limits as this angry galaxy throws everything it has at you.

A 2D Shoot-Em-Up with a focus on crew management, exploration, procedural generation, and corporate espionage.

Survive 10 enemy stages! Shoot 'Em Up style, spaceship game, in pixel art and 8-bit retro music! Evolve your shot to the maximum level, use the energy bar for upgrades, and special abilities! Advance each stage by defeating Bosses and enemies to collect new skills, transformations and extra lives!

WE HAVE ALIENS, YOU DON'T—Blast Martian invaders and flying saucers across 30 stages with robotic voice effects. Use your destructible shield, rescue army men for bonus points, and chase the high score.

Void Prison is a fast paced, endless arcade twin stick shooter that puts you inside of an ever shrinking ring. Survive by fighting emerging enemies around you and don't get consumed by the void. Complete achievements to unlock new skins and powerups and get on top of the leaderboards!

Captain Galactic is a colorful retro sci-fi platformer where you ride a hoverboard through strange alien worlds, collect crystals, unlock abilities and items, dodge deadly traps, and blast enemies with your phaser.

Alpha Force Zero is an intense top-down bullet-hell adventure that requires skill and planning. Utilize multiple weapon systems including an Auto-Turret with adjustable firing modes and unlock upgrades that you can equip in your ship to give you the upper hand. Dodge, fight, survive!

A vertical arcade shoot'em up with an inventive teleport system, lots of fast-blazing action and explosions, tons of boss fights, a risk/reward based score system and a proper challenge for both veteran and new players of the genre.

A top down shooter where you heal by getting near bullets, Little Blue allows you and 3 friends to bring Technitia down using nothing but their own technology and hubris.

AYIN, a surreal speedrun-rage-troll-platformer where you platform across many tough levels and uncover secrets of a world that hates you. 

Nebular Crush is 2D retro shooter that delivers non-stop arcade action. Armed with a magical surfboard and guitar, you must shred your way to victory through over 50 action-packed levels.

Destroy enemies, bosses and everything you see ahead!! Get crystals to buy better starships and get stronger. Have fun in three different game modes.

1CC Games’ first shoot ’em up returns with totally overhauled visuals, all-new enemies and attacks, a deeper scoring system, remixed soundtrack and fresh player powers. Space Moth: Lunar Edition is the ultimate version of the beloved cult classic.

You do not know anything, yet you have to move forward. Wander through the corridors of a mysterious factory and recover your abilities. Fight patroling drones and break through to demanding boss battles. Seek a way out and find the meaning of the game's title.

Jetboy is a retro supercharged jetpacking pixel shooter with a pumping metal soundtrack.

Galactic Explorers is a top-down 2D retro space shooter inspired by early games such as Galaxian, and Asteroids.

A sci-fi shoot'em'up game with heavy focus on upgrades experimentation, featuring two unlikely heroes that must work perfectly together, despite their share of secrets, to surpass their limits and succeed in eliminating a threat that might destroy both Earth and Andraxia if left unchecked.

Originally developed as a birthday gift for my nephew, Jackroid is a heartfelt indie game that blends classic action-platforming with Metroid-style exploration. After several requests and growing interest, I’ve decided to bring Jackroid to Steam. Free—as a thank you to everyone who’s supported me.