Top similar games like Orbital Defense Force:
Orbital Defense Force $9.99
Orbital Defense Force (O.D.F) is a multiplayer shoot 'em up co-op rogue-like game. play as mercenaries working for the O.D.F., accepting contracts to defend planets from invaders and earn precious scrap that can be used to upgrade their ship to take on more difficult contracts.
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Space Hero: Intergalactic Titan$2.99
A top-down "bullet-heaven" roguelite where you play as a futuristic space marine. Use a variety of damage and utility abilities in your attempt to survive. Earn tokens to spend on permanent character upgrades, ability upgrades, and ability mods that allow you to customize your playstyle.

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.

Gatekeeper$14.99
Gatekeeper is a fast-paced rogue-like. Go on a quest to find the stolen Heart of the Universe and shoot your way through the hordes of machine enemies guarding the planetary gates. Play solo or in 4 people co-op and become the next Guardian!

Enter the Gungeon$14.99
Enter the Gungeon is a bullet hell dungeon crawler following a band of misfits seeking to shoot, loot, dodge roll and table-flip their way to personal absolution by reaching the legendary Gungeon’s ultimate treasure: the gun that can kill the past.

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).

Mystic Gate$9.99
A Mystic Gate created by the gods suddenly appears in the human world. Adventurers challenge themselves with the tests that await them beyond the gate. In order to earn your wish you must defeat hordes & bosses in this roguelike dungeon exploration bullet hell!!

Roto Force$7.99
Shoot and dash your way through frantic missions! A twin-stick shooter set in a rotating world. Unlock weapons, move quickly and fight tons of bosses.

Touhou Renkyouto ~ Subterranean Festival of Love and Jealousy$9.99
Touhou Renkyouto is a top-down bullet hell title starring the green-eyed Parsee Mizuhashi. Adventure from the Underworld to the surface and back again to solve an incident involving stray spirits causing chaos, and maybe help Parsee realize her love along the way.

HOUSE OF GOD$2.99
As The House of God races towards heaven, Jack blasts their way to the conductor in this chaotic and fast-paced Rogue-Lite.

Massive$19.99
"Massive" is a stylized feast of frantic and action shooter for 1-4 players.

Rakuten$9.99
Rakuten is a physics based space shooter where you pilot your own rocketship, shoot down enemy spacecraft, and unlock upgrades to further increase your capabilities and available weaponry.

Astro Attack$2.99
A single-stick arcade shoot 'em up inspired by the golden years of retro gaming. Blast to the synthwave beat to combine powerups and destroy waves of invaders. Complete missions, compete on leaderboards, discover secrets, and unlock over 80 unique ships from every era of gaming.

Sky Force Reloaded$9.99
Sky Force Reloaded is a classic shoot ‘em up experience packed in gorgeous visuals and excellent gameplay. Enjoy flashy explosions, beautiful scenery and massive bosses in single player or local cooperative modes.

EON Trooper$6.99
Lead an elite squad on a hostile alien planet! Recruit and command up to 4 NPC soldiers with unique powers to complete missions and overcome waves of enemies. Level up and dominate the battlefield with strategy and teamwork. Get ready for action!

Police Stories: The AcademyFREE
Welcome, trainee! Use tactics and special equipment to become a true cop in the free version of Police Stories: The Academy. Neutralize criminals, search for clues and find a "rat" in the police station alone or in co-op with a partner.

Memento InfernumFREE
You are unpure, and you have to fulfill God's plan in Memento Infernum, tight top-down shooter where you have to face hordes of demons.

In Game Adventure: Legend of MonstersFREE
A top-down arena shooter with a wide variety of weapons and enemies. Confront hordes of zombies and monsters in totally random generated arenas.

Burning Skies ArcadeFREE
Lt Blitz has the city sieged, and it's your job to destroy his troops. Shoot, dodge and upgrade your jet and and try to take on this challenge! Burning Skies is a free, endless retro shmup, that will take you right back to the era of arcade machines, with modernized graphics and gameplay!

Bugs Must Die / 异星特勤队$11.99
A retro arcade style Top down shooting game. Shooting them with a machine gun, blasting them with missiles, dashing them with a vehicle, whipping them with an energy chain, or burning them with a napalm...No matter how you get it done, “ALIEN BUGS MUST DIE!”

The Battle of Aurinoxia$2.99
A retro space shoot 'em up with pixel art graphics, unique enemies, tough angry bosses, and a killer soundtrack. You are among the first pilots to arrive in the system to mount the counteroffensive against the aggressors. Get out there and show these aliens the price for messing with The Alliance!

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.

ProtoCorgi$6.99
Get ready to Bark’em Up! Play as Bullet, a C³ class (Cute Cybernetic Corgi) pup on his quest to save his owner, a brilliant scientist kidnapped by an alien race that wants to rule the galaxy. ProtoCorgi is a retro pixel art shoot’em up with a strong arcade feel!

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.

TechBeat Heart$1.99
SCORCHING TECHBEAT ACTION! A frantic combo-based score attack shooter. Make combos to earn more time. Master all weapons and defeat a raving mad machine. 100% arcade action. Online ranking. Lots of achievements. A Dual Gunstrike spin off.

Cloud Cutter$7.99
Cloud Cutter brings you classic arcade shoot ‘em up gameplay in top notch graphics. Enjoy intense fast-paced explosive action full of epic destruction, arcade style power-ups, lasers and of course huge multi-stage boss fights.

District Panic$3.99
an action-packed arcade shooter that takes you deep into the heart of a computer under siege.You're the system's last line of defense.

Rocket Blasters$0.99
Rocket Blasters is a fast paced, action packed shoot-em-up set during the invasion of the Dread Pizza Armada. Its hand-drawn art gives it a unique style. Blowing stuff up has never been so fun!

UBERMOSH:BLACK$0.99
UBERMOSH:BLACK is the second volume of the arcade series UBERMOSH. Cut bullets with your sword, shoot with heavy guns and splatter enemies with a rage fueled psionic wave.

Cosmula$5.99
Engage in an intense space shooter that you can play in single-player or multiplayer with up to 6 players. Play a variety of different spaceships, each with their own unique stats, components, and playstyles!

Cosmo Chaser$4.99
Cosmo Chaser is space fighter action game which presents restless shooting battle. It demonstrates new style of vertical scroll shooter by presenting classic arcade action in 3D space.

Manic Archers - Bullseye DEMOFREE
Manic Archers is the very first topdown Zelda-type versus game ever! It features simplistic and on-the-point gameplay with amazing game mechanics and lovely arcade style pixelart-details. It is playable with up to 4 players simultaneously on one screen in several variants.

Ayako's Mission$0.99
Ayako's Mission is a 2D Top-Down Shoot'em Up game based on the story of the war breaking out between the two territories called, AY Corp and ATO Corp. where you must defend your territory against the invaders.

Gun Bombers$3.99
Grab your pickaxe and enter the mines! Search for treasures and fight against other miners in this fast, round-based multiplayer game (up to 10 players over LAN or internet). Comes with a map editor and an addictive single player endless mode where you fight waves of enemy monsters.

Roguely$5.99
Roguely is a fantasy themed top-down shooter pixel art action roguelite with some bullet hell thrown in. Fight and dodge your way through the randomly generated maps to rescue your friends. Find upgrades along the way and save up arcane fragments for permanent blessings from the gods.

Kalzor: 2000$1.99
Shoot different types of spaceships while avoiding getting shot yourself. Kill 10 minutes at a time with this affordable colourful timewaster.

Star99$2.99
Shoot-'em-up meets battle-royale. Prepare your thumbs for adrenaline mashing madness.

Space Pressure 3D: PreludeFREE
Immerse yourself in the story of two brave space amazons who dare to challenge the irresponsible aristocratic system. Overcome all the obstacles that appear on your way - hordes of space scavengers, armies of General Admiral and get to the main villain - Evil Moneybag!

Asteroids: Multiplayer$2.99
A modern version of the classic arcade game

Swarmhunters$0.99
Swarmhunters is a top-down arena action shooter. The war between human and bugs has become worse - Project Swarmhunters emerged at this situation. You play as the best space soldiers in the galaxy and your mission is to strike the hive and hunt down the Emperor, supreme commander of bugs.

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.

Hyperspace Dogfights$9.99
Hyperspace Dogfights is a juicy jet-combat roguelite in which you blast, dodge and slice your way through masses of technologically inferior baddies. Your jet evolves differently on each run and becomes stronger and weirder by gathering some of the 300+ available items.

NOT A HERO$19.99
Professional assassin turned amateur campaign manager Steve is charged with cleaning up the city by an anthropomorphic rabbit and mayoral candidate from the future named BunnyLord.

Probo Rush$4.99
Probo Rush is a classic shoot 'em up bullet hell game with a boss rush twist. Fight against machines, aliens, and nature as you take on 15 challenging boss battles. With adjustable health and an Assist Mode, Probo Rush offers a challenging but accessible gaming experience.

EvoluShip$0.99
In this game with elements of roguelike, RPG and Bullet Hell, you control a ship with the power to absorb enemies and improve itself, but even then it won't be easy, because you'll face the hordes of enemies with a good variety of weapons that come randomly as you pass level.

---Red---Tether-->$12.99
---Red---Tether--> is an action-packed “combat-puzzle” roguelite. You will tear apart massive space fleets, using nothing but your advanced tether harpoons. Pull and crash ships into another, rip their components off, then grapple-swing your way out of danger.

Ember Crusade IV$7.99
Ember Crusade IV is a twin stick looter shooter roguelike where you embark on a blazing crusade to save the solar system from a demonic invasion.

Gene Shift AutoFREE
Gene Shift Auto is a GTA-style battle royale with roguelike build crafting. Loot, shoot, and adapt your build to create godlike synergies before the final fight.

Return Ace$4.99
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.

Ikaruga$9.99
Shoot! Dodge! and... Get Hit!? "Ikaruga" is a vertical shoot 'em up that features an unique polarity-switching gameplay. Switch the ship's polarity and "get hit and absorb" enemy bullets! Achieve High Score with the chain bonus!

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

Galactic Wars EX$7.99
Galactic Wars EX is a pixel perfect co-op retro arcade shmup retrogaming experience for modern pcs