Top similar games like Opalescence:

Take to the skies in this 2D depiction of World War 2 in the 1940's. You will be constantly under attack from Enemy war birds hell bent on taking you down.

Neon Invaders will take you back to your gaming roots with its constant action and relentlessly brutal enemies. Absorb enemy shots of the same colour to trigger a flurry of fire to decimate the alien invaders. Dodge and Match your way to victory through 40 levels and 5 difficulty settings.

Shmup. Unlock. Customise. Experiment. Upgrade. Basilisk. Petrify. Easy.

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.

Be shot and shoot back! Rule reversal type Shmup "Return Ace"What you have been given is the power to take advantage of the oncoming malice and return it.Please enjoy the unique sense of incompatibility, tension, and striking that the experience of bullet energy weaves.

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.

A New Retro Classic Centipede Arcade Game. Blast your way through waves of Centipedes and UFO’s in this fast paced 80’s style modern remake. 50 Challenging Stages with Vibrant Colors, Waves of Centipedes and UFOs, Arcade High Scores, Power-Ups and Full Controller Support. Time To Bug Out… Are You Ready For It?

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.

ZEROCRON is a straightforward, classical arcade Twin-Stick Shoot-Em-Up with a strong Commodore-Amiga-era feel. Blast asteroids and enemies to burning pixeldust!

After the last human war, gases were spread through the atmosphere making it unbreathable. The richest to fled to orbital colonies and the others took refuge underground. Get ready to fight giant Insects for the future of humanity !

A post-apocalyptic arcade shooter. Collect fuel and dodge enemy fire as you fight back against the evil Scorpio gang. Mixes cars, shmups and themes that would have been right at home in 80's anime and arcades..

Shoot your enemies and try not to let them multiply themselves and turn the game into a chaotic space battle! Space Maxwell is an arcade shooter where your spaceship has the ability to destroy or to multiply your enemies. Climb the leaderboard and try to survive as long as you can!

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.

Scavenge for weapons, ambush your friends, die trying. A Special Place In Hell is an 8-man fast-paced top-down battle royale-lite inspired by 4-bit games of the Atari 2600 era.

A bombastic bug busting adventure! Play as one of four playable characters in their quest to to free their fellow elves from the clutches of an evil army of spiders. If they crawl, blast em all! Let nothing stand in your way.

The more enemies you shoot, the more enemies spawn! 300 levels. 15 boss battles. Over 20 enemy types.

In this simple riff on an arcade classic, released in 1983 for the ZX Spectrum by famed game developer/publisher Ocean Software, search labarinthine levels for the exit, while surviving an ever-increasing onslaught of deadly robots.

A single-player arcade shooter where your bullets ricochet against enemies and walls. It's a bullet hell game too, if you shoot enough.

How long can you survive the depths of space in this fresh revival of the classic arcade shooter, all while grooving to an original score by Megan McDuffee. Pilot solo or recruit a friend for local co-op across 30 unique challenges or the endless arcade mode.

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.

An acid trip back to classic vector arcade action games with the unique bullet magnet mechanic. Dodge ruthless attacks, bend your projectile trajectory, destroy waves of enemies with the massive explosion chains. Die a lot! Then try again and get yourself to top of the leaderboards

PewPew! - move, shoot and upgrade!

Humans Vs Ghouls is an online top-down shooter following survivors of a ghoul apocalypse that blast foes to live another day.

Neon Fighter is a tiny arcade game packed with lasers and explosions, in which every few seconds you are forced to switch weapons automatically, making you have to adapt quickly to the new situation and re-evaluate your perspective.

Embark on a dangerous investigation in Ultra Mission™, the latest game by Gumbo Machine™. As an agent of the Stellar Exchange Commission, you must traverse the 20 dizzying levels within Otto Labs, each littered with powerful automatons and questionable experiments. This is going to be a blast!

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 small shoot 'em up that combines the charm of retro arcades with innovative gameplay mechanics, delivering a fresh yet familiar experience. A single coin gives you as many attempts as you want to get the world's high score.

Mashup of classic arcade games.

In the Valley of Death is a color-based hack and slash twin-stick shooter, where the player controls Red and Blue as they dash, slash, and shoot their way through challenging levels as they attempt to make it to the Valley of Death.

A semi-procedural shoot-'em-up that will test your skills. Level up your ship, unlock amazing weapons, and defeat 5 formidable bosses. Challenge the infinite by facing real-time waves of enemies after completing all missions. Become the intergalactic hero now!

Steel Alcimus is a top-down helicopter shooter. Complete various tasks with your ally aircraft; such as saving the carrier, taking down the buildings, carrying objects, etc.

In this unique top-down shooter, originally released in 1987, take on the role of the plucky little Biopton Nimrod, sent on a dangerous mission to rescue his friends from the 'Matrix' prison planets of the Cratons. Contains both the Amstrad CPC and ZX Spectrum versions of the game.

A twin-stick shooter where your music is your weapon. Whichever track you choose will power your engines and your lasers, but beware: your enemies are also driven by the music.

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