Top similar games like Opollo:

Absorb matching enemy fire, unleash devastating burst attacks, and survive escalating waves of neon arcade chaos in this fast-paced reactive shooter.

Space Waves is a procedurally generated 2D arcade style shooter with multiple collectable power ups and varying enemy types. This game will casually draw you in and then increase the pace and difficulty as you progress through the never ending levels.

Heliocide is a relentless top-down scrolling action! Arm your shields, lasers, guns, bombs and missiles to defend the solar system from a massive invasion!

Gravity Waves is a twin stick shoot 'em up in space with waves of enemies and realistic gravity to provide constantly changing gameplay.

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.

A space station, infinite waves, and a screen full of vector geometry trying to kill you. Your turrets auto-fire. Your satellites orbit. This is bullet-hell-yeah. In-game and permanent upgrades. 17 upgrade types across 9 weapon classes. Play, upgrade, repeat.

You are the last pilot standing against an enemy fleet. Upgrade your starfighter, face epic bosses, and survive the chaos of space battles. Astro Flame: Starfighter is a fast-paced arcade shoot ‘em up in the spirit of the classics.

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.

stranded in space with nothing but a gun, hostiles start showing up out of nowhere... what now? you can't escape, but you can boot and shoot

Gratuitous Shooty Game is a hobby space shooter made by the developer of Gratuitous Space Battles, reusing the art from that game :D.

A roguelite space shooter based around the classic arcade game. Shoot asteroids, ships, and take down the mothership in a multi-stage boss fight, avoiding lasers and explosions. Upgrade your ship during and after your run in this casual simple roguelite.

Akka Arrh is a modern take on a scrapped project from the 1980s, providing players with a fast-paced, addictive, arcade shooter experience and psychedelic visuals. Protect your life rings as you chain together combos and go for a high score!

Mashup of classic arcade games.

Bullet Hell or Heaven? A rogue-like where you upgrade yourself and your enemies. Strategize around your build choices and dominate the battlefields of Novi Blaster.

Fight through waves of enemies across shifting arenas, buy upgrades between stages, invest in new ships, research permanent upgrades between runs, and compete on the global leaderboards in this blood-pumping twin stick shooter.

DIASPORE is a vector-style space survival roguelite with inertia-based ship handling, a toroidal arena, auto-firing weapons, and a hostile ecosystem that grows more dangerous the longer you stay.

Defend Spacebase 19 from the asteroids swarming down on the station! Shoot down waves of stones and equip different powerful weapons. How many waves can you last? A simple nostalgic retro arcade turret defense shooter.

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.

Inspired by the cult classic Mine Storm, Storm Mined modernizes arcade space shooting with rogue-lite upgrades and rhythm-based stages.

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

Retro arcade shooter inspired by classic 80's games Fast-paced side-scrolling shoot ’em up with looping battlefields, relentless enemy waves, tactical shields, power-ups and hyperspace jumps

Vampire Survivors spotyka bullet hell — w kosmosie. Pilotuj statek 2D, łącz gałęzie broni w rozbitne buildy i przeżyj fale kul oraz bossów z prawdziwymi mechanikami. Projekt solowego indie deva.

A vertical-scrolling space shooter, and a love letter to classic arcade space shooters, Tryü Sora blends retro charm with modern gameplay. Master a handcrafted campaign, explore secrets, and dominate fast-paced modes in this addictive space adventure!

INSPACE 2980 is a stylish and dynamic SHMUP from the 16-bit era of games consoles and arcade machines. Take part in an exciting adventure and save the galaxy! Once again!

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!

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.

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!

Repel extraterrestrial entities!

Master the difficult art of dodging bullets while blasting thruster flame in the face of your enemies. No guns, no upgrades, no level-ups. Just your reflexes against an endless bullet hell maze of death. How long will you survive?

A throwback to retro shoot'em up games typical of the 80s, where you play as a tooth fairy fighting against rotten teeth and bacteria using different abilities and special shots.

Destroy the deadly bouncing orbs for the highest score in this Pang meets Asteroids arcade blaster.

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.

Blast your way through enemy territory and level up your versatile arsenal of high-tech weapons in this handheld game style retro shmup!

Ore & Ordnance is a Retro styled, Sci-fi, Bullet Hell. Survive endless waves of Pirates, Asteroids and Firestorms. Collect upgrades, complete missions and survive your shift! How long will you last?

SOLSTORM is a classic hand-crafted arcade bullet hell, skillfully weave, and dodge through 9 stages with waves of projectiles as you persevere and see a space odyssey to the end!

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.