Top similar games like Galaxy Annihilation:
Galaxy Annihilation $2.99
Galaxy Annihilation is a shoot'em up where we need to protect the planet earth from an impending alien attack.
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ASTRO ACE$2.99
ASTRO ACE is a retro-style addictive arcade space shooter. From the distant universe, an evil alien fleet is invading the solar system. You will have to ride a powerful spaceship and fight against endless waves of enemies.
AST-Hero$4.99
Fight for survival in this top-down shoot ‘em up in space, featuring unique hand-drawn visuals and sounds. It offers a challenging experience that is easy to learn, but difficult to master.
Planet Automata$3.99
The galaxy is being threatened by an army of robots, but a brave hamster will step up as the hero!
Guardians of Orion (Phase 2)$0.99
Guardians of Orion is a Sci-Fi Action RPG Looter Shooter with Dinosaurs and Robots. Complete Mission Objectives all over the Galaxy with your friends to earn new Gear & Rewards!
Totally ShmupFREE
Beginner friendly 2D vertical and horizontal retro-style little shoot 'em up. Colourful stages with sound and vision inspired by the golden age of video gaming. Totally free introduction to the world of Shmups and Bullet Hell Games!
Starship Scarwolf$3.99
Starship Scarwolf is a 2D top-down omnidirectional shooter. As I'm a fan of vector scan games, I aimed to create an expression using only wireframe rendering. However, I couldn't achieve this with just dots and lines, so I also used fill and circle drawing functions.
Cone Flyers Mercenaries$4.99
Welcome to Cone Flyers Mercenaries! Fight many dangerous enemies, delve into deep dungeons, and pilot your cone ship with precision platforming and a unique combat system in this tough as nails bullet hell.
Invasion Resistance 2$0.99
A PC first-person shooter game with a short single-player campaign containing 13 maps and several cut-scenes.
Neon Aileron$3.99
Neon Aileron is a shoot 'em up for people who are bad at shoot 'em ups. Enjoy the forgiving gameplay and 16-bit era graphics while shooting lots of enemies that spawn to the soundtrack!
Evochron Legacy SE$24.99
Advanced Space Flight, Combat, Trading, and Exploration Simulation. Set in a vast explorable universe, Evochron Legacy offers freeform gameplay with many diverse objectives and paths to choose from.
Super Bit Blaster XL$2.99
A SUPER throwback to the classic quarter eating arcade games of the 80's. Super Bit Blaster XL is an (even more) enhanced version of the retro styled, addictive, and fast paced arcade shoot 'em up!
SodaCity$9.99
SodaCity is an action, fast paced game, with hybrid beat/shoot ‘em up gameplay.
PLOT!$5.99
Hardcore Precision Platformer! Can you post the fastest time - or will you lose the PLOT!
I Hate Running Backwards$14.99
I Hate Running Backwards is a never-ending adrenaline packed shoot'em down roguelite that puts the emphasis on destruction and fighting never ending waves of enemies while time traveling through procedurally generated worlds!
Devastation - Annihilate the Alien Race$2.99
Devastation - Annihilate the Alien Race, is a 2D, dual stick shoot em' up, bullet hell, arcade game. Tear up hordes of aliens with skill based game play, bombs & upgrades to obliterate everything!. Gun down 11 massive bosses, bank insane score on the leaderboards & overcome clouds of enemy fire.
Bit Blaster XL$0.99
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).
Crazy Steam Bros 2FREE
Crazy Steam Bros is a classical horizontal shoot'em up inspired by the gameplay of old arcades. Anton and Dupont are brothers, inventors, and a little mad also! With the help of their landlady, Miss Lily, they must defeat the evil Baron and their hordes of moustached soldiers.
Ozone Guardian$2.49
A new twist on the classic arcade shooter, with a variety of character choices and an upgrade system. Control your spaceship with your mouse & shoot with click - the only limitation is your hand speed! Face waves of creative enemy ships and stimulating bosses, and protect the ozone, Ozone Guardian.
Neckbeards: Basement Arena$3.99
Based on classic arcade games like Robotron 2084, Neckbeards is non-stop action for one or two players with an epic soundtrack and a taste for psychedelia. NEW in 2023: THE FIFTH ANNIVERSARY UPDATE!
Cardiac Powder$2.99
Cardiac Powder is a nervous twin stick shooter where you have a bomb in you, if you can’t maintain a certain heart rate, it will explode… So one thing to do is keep you in action by fighting your opponents!
Soundsaber$4.99
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.
Broken Sky$7.99
Broken Sky is a fast paced dogfighting shooter featuring unlockable planes, explosive weapons, special abilities and Shoot 'em up madness. Responsive controls combined with super fast air combat will have you coming back for more in your bullet hell quest to defeat the alien takeover.
While you are Downloading$0.99
A quick and action paced retro styled arcade shooter, or shoot 'em up (shmup) if you like. Perfect to play in short chunks, like when you are waiting for big games to download.
Santa's Monster ShootoutFREE
Monsters and Zombies from all the world are trying to steal the gift packages, they want it all and they want it now. But Santa has guns, big guns!
FireAirPlan$0.99
Shoting!!!
Stacks:Space!FREE
Stacks:Space is a space-themed base builder card game with rogue-like elements. Buy booster packs to get new cards, discover craft recipes by stacking cards together, create structures, manufacture drones and droids, defend your base from enemies, visit distant planets, and more!
Captain Hannon - The Belanzano$19.99
Charlie had been desperate to get off Morland after being without a ship for over a year. He’d saved every credit he could to pay the deposit on the freighter. Perhaps in hindsight, purchasing the Belanzano wasn't the greatest plan but it was a start!
Voxel Interceptor$0.99
Now you can select your control style in 3 different ways!. 6 different upgradeable space interceptors, 9 different weapons. You can supply in your carrier and upgrade her defenses. Shoot enemies down. That's all.
2099 Gravity HavocFREE
Shoot at enemies in a WEIGHTLESS space station to save yourself from burning alive in the atmosphere!
Protolife: Other Side$8.99
Reverse Tower Defense game where you control waves of creatures against towers. Protolife game spin-off.
Proxy Air Force$3.99
Proxy Air Force is a 2D Arcade Shoot Them Up game based on the story of the world war which broke out between the US and CES countries in 2020.
In Other Waters$14.99
Play as an Artificial Intelligence guiding a stranded xenobiologist through a beautiful and mysterious alien ocean. A non-violent sci-fi story, enter a world of wonder, fear and vulnerability, unraveling the history and ecology of an impossible planet. What will you discover together?
Space Dragons$9.99
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.
SpaceWorm$2.99
SpaceWorm is a casual retro game where you eat stars, planets and kill space-bugs.
Deep Nest$4.99
Deep Nest is a fast-paced single player action shooter roguelite where you play a space marine fighting off an endless horde of alien monsters in an infested facility.
Protect the Planet$0.99
This is a simple typing game. In the game, the alien from the UFO is very evil, he will shoot many missiles to attack the planet. You need to type and type, to destroy the missiles, to protect the planet.
Emme Saves the Galaxy$2.99
Join Emme the dog as she battles block invaders in this puzzle action game. Defeat all kinds of unpredictable blocks across hundreds of levels.
Madrobot X$2.99
MadRobot X is an old school shoot 'em up game. You control a robot trying to escape from the laboratory of a mad scientist, and to accomplish this, you'll need the help of GoboGobo, another robot who also wants to escape.
GIBZ$6.99
Shoot, slice and surf on zombies by yourself or with friends. Fight overwhelming amounts of zombies and other monsters summoned by an evil wizard (ooOooOOOo spooky) in an early 1900s London.
Eldritch Hunter$4.99
Purge a horrific lovecraftian cult from your city and save the Pope as a lone inquisitor with a crossbow.
Children of Apollo$0.99
Children of Apollo is an exciting twin-stick shooter in a short, arcade style format using a blend of classic and modern gameplay elements. After the Apollo missions humans send an expedition to explore Mars but things go terribly wrong.
Dextram$5.99
This arcade shoot 'em up has no shooting and you can only turn right. Avoid waves of enemies and get points as they crash into each other. Pick up power-ups, such as a large laser or a force field to destroy the enemies. Die, get a score and repeat to get a higher score the next run.
UFO: Unidentified Falling Objects$14.99
Unidentified Falling Objects is a unique mashup of platforming and puzzle destroying gameplay. Players are dropped into the puzzle where they must dodge the falling obstacles and destroy blocks to make big combos.
Huge Enemy - WorldbreakersFREE
Huge Enemy is a horizontal Shoot ‘em up that takes place in a dark sci-fi universe with Japanese influences.
Devastation 2 - Repatriation$3.99
Kill enemies, earn a multiplier, build score, unlock weapons, upgrade content, achievements. Battle in a revolutionized futuristic environment with 12 dynamic levels, fight bosses and waves of enemies. Equip 11 weapon types, 6 missiles types, customize classes, repair damage and unlock skins
Blaster Squad$4.99
Explosive side-scrolling couch co-op run'n'gunner with hundreds of levels and unlockable ammo types. 1-4 players.
Definitely Sneaky But Not Sneaky$4.99
Definitely Sneaky But Not Sneaky is a fast-paced action game featuring tight controls and epic slow-mo combat. Unlock items, customize your gear, and take out your enemies one by one! Co-op included.
The Mobius Machine$19.99
Discover a vast alien world. Fight the ferocious local fauna and killer machines. Reveal its secrets and find a way to escape. The Mobius Machine is a side-scroller action adventure, with an emphasis on free-form exploration and intense combat.
Space Viking Raiders$4.99
Co-op action role-playing comedy in a sci-fi multiverse. 3-5 hour campaign, 1-4 players online! Badass abilities will have you wreck havoc with physics and mass destruction. The best vikings use their limited energy to efficiently wipe out hordes of enemies. PvE MOBA-style hack-and-cast!
Spinner Invaders$7.99
Shoot your way through a thrilling action adventure of 120 waves in 4 different game modes while fighting against waves of enemies and 12 extreme bosses. Save the world from The General by yourself or with a friend locally and play 10 different Challenges.
They Do Not Die: Call of Crimson Tgirl Apex Land Zombie Shooter Duty 2D Keywords$0.99
I just think that top down shooters are neat. It's a pretty zen time. A podcast game.