Top similar games like Polybius Invaders:

Sidescrolling Shoot’em’up that will transport you back into the 90s (and space).

Classic scrolling shooter with modern graphics. You are self-aware AI. You were created on space military station developing weapons. Now your goal is to break out of the lab and win your freedom.

Hypnorain is a vertical bullet hell shooter. The player guides a character through handcrafted levels, shooting and dodging their way through an army of enemies and their mesmerizing bullet patterns.

Syder Reloaded revives the Syder series in this love-letter to 90s Amiga shmups with upgraded graphics and refined gameplay. Challenging levels, a fleet of ships and a motherload of alien invaders. Get back to your roots and curse at your monitor in this skills-first shooter.

Blaster Panic is a 2D space shooter where you defend your home base against an onslaught of enemies. Fight through ongoing boss battles. Last as long as you can to dominate the leaderboard.

ShapeNeon Chaos is an old school style space-shooter. You are a ship facing off waves of deadly enemies. This game was made to give you a shot of adrenaline in a couple of minutes. Lots of bullets and neon in an arcade psychedelic shooter!

Combining retro puzzles and a arcade space shooter. You and your crew found strange materials in the galaxy core to upgrade your ship to the most powerful. While collecting core materials you came across something unbelievable ... The Core Message. The Core Message changes everything.

Red Horizon is an addictive space shmup game. Heavily influenced by the classics of the past, Red Horizon takes a modern spin on the genre combining it with some subtle Rogue-like elements to provide players with a unique experience every time they play.

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.

X-Force Under Attack brings back all the charm of shmup games from the 80's/90's. It's a frenetic and chaotic space shooter with insane battles against extremely difficult bosses.

Return Home is an abstract horizontal shooter with dynamic levels and metaphorical explosions. The game is randomised and altered according to how well you play.

The Last Archwing is a fast paced, vertically scrolling space shooter. Will you and your friends take up the mantle as Earth's last defenders and thwart the plans of the evil Emperor Zarkhan?

Single player on rails shooter featuring aerial combat, nostalgic nods to classic arcade shmups, synthwave inspired aesthetics and a vibe to take you straight to the 1980s.

Will you have what it takes to avenge your father, defeat the evil DreadSkull and save the galaxy? Collect gems and customize your ship to get through six replayable sectors, annihilate your foes and fight epic bosses in this classic styled pixel art shoot'em'up with RPG progression.

It's the ultimate, strategic SHMUP ReMix! Control TWO combat wings, flick between THREE different formations, and BLAST your way through overwhelming enemy fleets! Liberate planets, build colonies, research tech and skills, craft items, or even play 2p co-op in this unique new indie game.

An intense, bullet hell, arcade style game with old school mechanics and art. Fast action, dodging fireballs and waves of enemies while aiming accurately. Can you survive dragon dodge valley?

A throwback to the classic quarter eating arcade games of the 80's. Bit Blaster XL is a retro styled, addictive, and fast paced arcade shoot 'em up! (shmup).

Warspace is a arcade space shooter game.

Retro arcade classic, Defeat a million invaders from another dimension in this side scrolling shoot'em up.

Spacegirl 2038 is a fast paced, high energy arcade style shooter. Save your sister and her crew, they're depending on you!

Vostok 2061 is a modern-graphics vertical scroll shooter. Gorgeous alien worlds, spaceships, and bosses. Explore mysteries as you listen to a great soundtrack!

Repel extraterrestrial entities!

Grab up to 3 friends and defend the sun from swarms of enemies in this local coop twin stick shooter. Siphon energy from the sun and shoot as many attackers as you can to claim the high score before it explodes! Fight over experience and upgrade your ship to keep up with the ever-mounting pressure.

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.

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

Your job is to locate and transport the containers to your base avoiding enemies on your way. Your ship is equipped with a hook to carry the containers. This is a physics based arcade game, inspired on the very early classics and with a strong Commodore 64 feel on it.

A retro-inspired 2D space shoot-em-up. Mine asteroids! Shoot alien saucers! Get rich or die flying!

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.

Pentasma is a side-scrolling arcade shooter inspired by Williams Electronics' 1981 classic 'Defender'. Protect The terraforming Humanoids from the deadly Aliens and raid the Alien planets to keep the galaxy peaceful!

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.

Experience the ultimate challenge in Eclipse Survivors, a bullet-hell / area shooter game featuring epic bosses inspired by classic 16-bit titles. Collect XP gems, master unique skills, and dodge countless enemy bullets as you face off against hordes of foes. Will you survive the eclipse?

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.

Railgunners is a shooter built to highly customizable difficulty levels. Fight your way through hundreds of enemy ships, and help humanity fight back against the alien invasion!

Endless arcade action with just ONE button - Switch directions whenever you shoot!

Destroy waves of UFOs in a arcade style space shooter with an array of powerful weaponry.

Super Galaxy Squadron is a fast-paced vertical shooter designed for human beings as well as SHMUP veterans. Featuring multiple game modes, a challenging but merciful difficulty curve, forgiving health system, and SEVENTEEN playable ships.