Top similar games like Squad 51 vs. the Flying Saucers:

Squadron 51 Prologue is free version of Squadron 51. It features 3 levels of entertainment, adding English voiceovers, a never-before-seen boss, and new gadgets for your spaceship to defend Earth from a merciless alien invasion.

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

Ziggy's Cosmic Adventures is a VR cockpit game combining ship management with action-arcade combat. You play as a bounty hunter with possibly questionable morals, currently in possession of a little alien that you may or may not have stolen from the evil Empire. Do you have what it takes to survive?

Defend the galaxy from vicious space pirates! Seize your foes and fire them back at their allies for devastating destruction in Toaplan's legendary horizontal arcade shooter, now on PC with all-new features and quality-of-life bonuses!

Take back the Theed Royal Palace in this fast and furious lightsaber action game. You will have the power of the Force and your trusty lightsaber to help you ward off legions of battle droids, destroyer droids, assassins, and other creatures from Star Wars: The Phantom Menace.

A retro shooter with a new power: the power to become any ship.Lost in the depths of space, you are a being of pure psychic energy with the uncanny power to take over and control anything you see in order to survive.Built for PC, Enemy Mind lets you battle your way through 70+ waves of challenging enemies.

Swords and Their Boy is a 2.5D sci-fi souls-like action about two AI swords using a mortally wounded boy to finish their task - cleanse an alien planet before its colonization.

Sagittarius is a classic side scrolling space shoot'em up in a modern take. In this epic space game it's up to you to save our solar system from destruction. Fly alone or with a friend in a local multiplayer co-op game.

Explore and fight your way through a crashed human spaceship infested with relentless hordes of aliens as you become more powerful with exciting weapon upgrades and powerups in this retro inspired first-person shooter.

You have a very important mission. Be a hero who saved humanity from extinction. Fight intense battles, use all your skills and destroy all the threats that are coming to our planet. Remember, we don't know exactly what we are dealing with, be careful. You are our hope.

A top down, twin stick shooter inspired by classic retro arcade games with loads of enemies, fast paced bullet hell combat, big boss battles and tons of bullets.

Dal R’El and Gwyndala race against time to save their friends, their ship, new alien species and an entire planetary system before a supernova destroys them all, while battling a deadly new enemy that will stop at nothing to destroy the Protostar and change the very course of history! 

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!

Retro-inspired arcade-style shooter. Save humanity from incoming waves of flaming hot meteors, alien ships hell-bent on destroying humanity, and the strangeness of space by shooting, blasting and nuking incoming waves of meteors and enemies.

Explore space and race against the clock in this retro styled adventure game.

ASTRO AMIGO is a heartfelt, sci-fi adventure where a bullied kid stumbles into a cosmic mystery after his beloved dog, Amigo, goes missing. With summer break just days away, can he survive school and save his best friend before it’s too late?

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.

Astro Fighters is a tough old school vertical scrolling bullet hell shooter designed to test your skills with non-stop arcade style action. Fight against large bosses at the end of every level and compete for the high score across 4 difficulty modes to be the best fighter pilot in the game.

You are a hungry, young hoverbike racer who needs to get off Earth before it E-X-P-L-O-D-E-S. Hunt bounties, throw races, and do whatever you can to get to Mars and win the Grand Prix.

Katalyst is a 2-D Space Shooter for the people who love and grew up with Space Shooters! Guide the Hero on his journey to defeat the evil aliens threatening civilization! If you like dodging bullets, precision shooting, and only being able to move in 8-directions, then this game is for you!

Grab a friend and dog pile on foes in the action packed 2D adventure!

Escape the asteroid and solve challenging puzzles in Korlax Escape, a thrilling cartoony sci-fi game that puts you in control of a UFO. With shooting mechanics and moving hazards, retro-gamers and speed runners will love the exciting gameplay. Can you make it out alive in Korlax Escape?

Steel Saviour is back! Try yourself at this revised 16: 9 version of a cult side scrolling shooter.

In this classic side-scrolling shoot-em-up, originally published in 1989 for the Atari Lynx handheld console, take on the role of a starship pilot trapped in a web of 51 interconnected hostile universes by the evil spider Zendocon.

Jet Gunner is reloaded, remade and refueled for a new explosive 8-bit adventure. Relive the past glory days where VHS was king, phones didn't have screens and you'd have to blow into a cartridge to get your gaming fix.

Fly through the exciting skies in this unique side-scrolling platformer! Collect balloons and feathers to gain the ability of flight as you navigate dazzling landscapes and face off against surprising obstacles and enemies during your aerial journey across the world!

Fire up a wild ride across the cosmos with a fresh take on Marvel’s Guardians of the Galaxy. In this action-adventure game, you are Star-Lord leading the unpredictable Guardians from one explosion of chaos to the next. You got this. Probably.

Covenant: Project Zero is a space opera set in a universe where interstellar corporations and big money interests run everything. Embark on an action-packed adventure as Captain John Covenant, accompanied by a band of rag-tag misfits, to confront the dark evil lurking in the universe.

Dive into the heart-pounding action as MT Force, an elite government unit racing against time to unravel the mysteries of enigmatic anomalies. Rumors suggest that a mysterious scientist made contact with aliens, and now everything is out of control!

Asteroid Blasters is a non-stop action space shooter. Inspired by Asteroids, this game will see you choose between 6 different ships each with their own characteristics and utilize a variety of weapon powerups to eradicate your enemies. Play 2 players to increase your chance of survival.

Jump into this new battle in this new side-scrolling shoot’em-up, face enemies and obstacles from every corner of the Milkdromeda Galaxy and encounter strange fun transformations that change the way the game plays.

The Lost Planet Zenox is inspired from an old retro game called "Thrust". You found a mysterious mineral at the asteroid belt of the Zenox Planet. But before bringing it to the earth your ship got attacked by pirates and crushed to the Zenox. Why pirates attacked and how will you get back to Earth?

ZPF is a retro-inspired horizontal shooter for the Sega Genesis/Mega Drive. Blast your way through a cosmic gauntlet of epic boss battles, addictive scoring, and hidden secrets in a thrilling arcade-style adventure through fantasy, sci-fi, and alien-themed worlds.

We’re back in the distant Past, when “Rock & Roll” was just about rocks and “Fast food”, a dinner that you couldn’t catch. 2 cave dudes named Joe & Mac live in a peaceful and cool village. Cool it was, until a bogus bunch of Neanderthal snatched all the village’s women!

Space bounty hunter Falco must explore the solar system in search of his ex-girlfriend and destroy the Black Star cult. Collect bounties, upgrade your equipment, explore planets, crack wise & fight aliens in this GZDoom-powered Retro-FPS adventure.