Top similar games like Galactic Sentinels:

The Rush is a horizontally scrolling shoot 'em up with graphics inspired by classic space shooters of the MSX. Buckle up and see if you have what it takes to master the highly adaptive Chameleon Quartz space fighter and single-handedly obliterate the alien invaders!

A wormhole has opened up letting aliens terrorize your city. Pilot your spacecraft and destroy the aliens using flamethrowers, missiles, gatling guns, shockwaves, and more!

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.

Bydo Missions in Your Pocket — Beyond Dimensions, the Melody of Two “R”s.

An action bullet hell. Dodge enemies attacks and collect upgrades to make it to the end of each level.

A shmup without shooting. Reflect the bullets with one of your two shields. Bite-sized arcade action. Cover humankind's retreat and make it count.

The year is 1989. 12 years have passed since the Gogoh Army’s invasion of Earth. Exposure to alien technology during the war enabled Earth’s own technologies to take massive leaps forward. International conflict that was previously rife in the history of mankind fell to an all-time low, and the Earth Federation was established as a...

Defend the Little Spaceman Dudes from aliens! Blast waves of Alien Abductors and UFOs across 50 challenging levels in this fast-paced ’80s-style arcade space shooter.

Pew Pew Pew, KaBOOM! is a challenging old school arcade game filled with action! Unlock new costumes and enjoy the awesome Chiptune OST as you reach new highscores!

Bad Chicken is a retro styled sideway scrolling shoot-em-up inspired by the retro classics. It takes place in 8 locations in the Ferus system, each one with different challenges, and dangers.

Dodge, dash, and blast through five handcrafted worlds in a fast pixel-art arcade shooter built for score chasing, boss fights, and perfect runs. Free demo available.

Blast and weave your way through enemy fire while managing a wide variety of ship power-ups in this retro style horizontal shoot-'em-up!

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!

Defend Terra against the onslaught of hostile invaders in this 2D top-down space shooter. Upgrade and empower your ship's different systems to stand a chance against the growing threat. If you fall, Terra falls, and the rest of the galaxy will soon follow.

Astral Bounty is a brutally hard 2D arcade sidescroll shooter straight out of the 90s. Shoot your way through hand-built formations, earn credits as you go, and spend them on upgrades, checkpoints, and revives. One difficulty setting, four ships, no mercy.

Embark on a thrilling journey as a space mercenary! Customize your ships with powerful weapons and modules, choose contracts and destinations, and battle enemy fleets and epic bosses. Your decisions shape the universe around you, so forge your path in this action-packed space shooter!

Escape Space is a classic arcade space shooter with RPG mechanics. Fight for various factions against swarms of enemies or bosses and improve your standings, level up your rank, unlock new gear and weapons, and upgrade your spaceship.

Betrayed by her cut-throat crew, Luna Starr - former Space Pirate Captain turned bounty hunter - has a score to settle. As Luna, travel to 5 exotic planets to track down your mutinous mates, and face them in Bullet Hell dogfights to the death!

Turn the incoming swarm of deadly bullets into your own weapon of chaos in this precision STG bullet hell. Grab and toss enemies, dodge and deflect torrents of bullets, and reshape the battlefield with explosive chain reactions.

A great space escape action game where a chicken flees a farm, triggering global collapse. Navigate crumbling 2D terrains in real-time to survive. Experience a perilous escape centered on 'Freedom' and 'Responsibility,' where your quick reflexes are key to avoiding total doom.

A retro-style classic side-scrolling shoot ’em up. Fly Super Arcade Boy through 8 levels, blast enemy waves, grab power-ups, and take down bosses.

classical horizontal scroll 2D Shmup

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.

Ranphon is a side-scrolling space shooter where you control a small ship called Phon in a vast and frantic space full of hostile spaceships.

Gemaboy Zero X is an action, exploration, and platform Cyberpunk Ploidmania videogame. It is the latest installment in the PLOIDS saga in which Omega will have to travel through time to preserve it and rescue his beloved Alpha!

Choose your spaceship and defeat the alien threat that comes from the Moon. Blast your way crushing, ripping apart and exploding hostile aliens that are taking control of powerful weapons and military technology from Earth. Find the entity that controls the threat and make it explode into blood.

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!

Space Mash is a bullet-hell shooter in the retro style of the earliest arcade games. To help beginners, older players and those with a motor impairment, there are five levels of slow-down that can be activated at any time during game play.

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.

Can "Super Meteor" save the universe from the space debris created by the development of space by the people of Earth?

Offendron Warrior is a retro arcade that combines shooting and defense. Your objective is saving Offendron civilians in the planets from the group of enemies, who are trying to spread a virus that turns Offendrons into mindless killing machines and eventually destroy the whole planet.

A bullet hell shmup with a secret. 100 waves, 20 bosses, and the slow realization that the sector you're purging isn't a sector. You are not crossing the void. You are inside it. Now with local co-op: two pilots, one screen.

Gear up for an intergalactic thrill ride! Space Elite Force is a frenzied space-shooter packed with weapon customization and epic boss battles. Take command of your ship and fight for the survival of humanity!

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

Spacejack a UFO and turn alien tech against its owners across 49 action-packed stages. Use black holes, nukes, slow-mo, and more to survive escalating waves and save the planet.

High speed arcade shooter built in the style of a lost 1980s vector game. Fight across looping battlefields, defend ground installations and survive relentless waves of enemy attacks!