Top similar games like All Systems Operational:

VOID SKIRMISHER is an arcade co-op shooter for up to 8 players: jump the gate before the front line even exists, and face down hostile fleets as the first wave out where nobody's been before.

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!

Sine Mora EX is a side-scrolling shoot'em up that provides a unique challenge, where time is the ultimate factor. Mixing classic shooter sensibilities with contemporary presentation, Sine Mora EX is a gorgeous shoot'em up offering both a Story Mode that weaves an excessive tale and an Arcade Mode.

A shoot'em'up game for up to 4 players that combines advanced RPG advancement elements with pure space shooter action, 20 unlockable weapons & 4 heroes with varied strengths in their 10 primary stats, along with each ship's 10 aspects, add a huge variety of choices for all gamers.

Carefully designed, beautifully remastered, and loaded with new ways to play—Risk of Rain is back and better than ever! Dive into the iconic roguelike full of unique loot combinations, enhanced with new Survivors, overhauled multiplayer, fan favorite content from Risk of Rain 2, and more!

Retro top-down space shooter: hold the mothership through 100 waves, build your fighter from 22 modules and 26 modifiers, earn eight complete ship designs, and fly with up to 4 pilots in Steam co-op through stargate corridors, the asteroid belt and the fog convoy.

Equip your battleship's guns, install faster engines, and increase the power of your reactor. Throw a barrage of rockets on hordes of enemy ships, burning everything in your path!

Dive into 'Eternal Reverie,' a team-based roguelike shooter exploring the mysteries of an eternal war. Solo or in co-op, navigate diverse planets, pilot unique ships, and customize with 80+ upgrades. Unveil secrets on branching paths to increase your roster and discover the truths of the universe

ZombCube is a first-person, cross-platform, zombie survival, wave based game. Play solo or with friends all over the world destroying the evil ZombCube's. Use teamwork, leadership, and skills to be the best and rank on the leaderboards.

A co-op bullet-hell survival shooter for up to 8 players. Choose from 5 classes, break boss weak points, and survive intense barrages in Solo Stage, Infinity and Boss Rush modes.

DARIUSBURST Chronicle Saviours is the latest installment in Taito's DARIUS series of arcade-style shooting games. Blast hordes of alien sea-monsters, and blaze your own trail through branching environments.

An arcade shoot'em up with unique power-infusion gameplay. Face down an unknown army alone or with a friend in online or local co-op. Navigate the cosmos to save the remants of humanity, or join them in extinction!

Sagittarius is a classic side scrolling space shoot'em up in a modern take. In this epic space game it's up to you to save our solar system from destruction. Fly alone or with a friend in a local multiplayer co-op game.

Command destructive spaceships to obliterate hordes of enemy vessels, while quickly solving puzzles to weave through networks of vibrantly colorful, adversarial machines!

Turn the incoming swarm of deadly bullets into your own weapon of chaos in this precision STG bullet hell. Grab and toss enemies, dodge and deflect torrents of bullets, and reshape the battlefield with explosive chain reactions.

Choose your ship and command it against an army pitted against you in this wave-based arcade-style bullet hell space shooter. Fight for as long as you can with powerups acquired through the catalog, and blast through everything in your path.

Battle for survival against endless alien hordes with your friends! The Anacrusis is a first-person shooter that dynamically adjusts difficulty to you. Experience intense 1-4 player co-op action or play as the aliens and stop your friends in 1-8 player Versus mode. Full Steam Workshop support!

A retro shooter with a new power: the power to become any ship.Lost in the depths of space, you are a being of pure psychic energy with the uncanny power to take over and control anything you see in order to survive.Built for PC, Enemy Mind lets you battle your way through 70+ waves of challenging enemies.

1-2 players, game controller support. NO in-app purchases. Over 45 minutes of music! 13 detailed stages, partly-random, with bosses. Tons of weapons, guards and special moves. Play in a window or in Full Screen.

Killing zombies never gets old, but sometimes you just need a break. Get back to some serious old-school gaming with Syder Arcade! Syder Arcade is a love letter to Amiga games of the ‘90s, no coins, no upgrade grinding, just your tenacity and a motherload of alien invaders.

Building on the legacy of R-Type Dimensions and R-Type Dimensions EX, Dimensions III has been completely re-envisioned with cutting-edge visuals and sounds, expanded gameplay modes, and a range of new features designed to deliver the most definitive modern edition of R-Type’s classic era. 

An indie action-RPG where you pilot customizable ships through side-scrolling combat, level up unique characters, and dismantle a corrupt galactic regime one mission at a time.

A two player, co-op horde shooter with a sci-fi, futuristic twist – play as two heroes, a cyborg and a samurai, working together to defend worlds across space and time from invasions of creatures. As levels are explored, upgrade each character’s abilities in order to take on enemies and a boss!

Space shooters never die. 1993 is a testament to that. 1993 is a classic shoot em up celebrating games like Gradius, R-Type and Life Force.

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!

B.L.U.E. NOVA is an online co-op PvE third-person shooter that grows from solo play into battles with up to 30 players. Choose your hero, connect through “R.I.N.G.”, unleash “Infinite Barrage,” and join forces to destroy the final “Master Tower”!

Pawarumi is a modern shoot’em up set in a retro futuristic sci-fi pre-Columbian universe. You’ll take control of the almighty ship Chukaru and its three unique weapons! Shoot wisely to either do double damage, heal yourself or charge your Super Attack!

CounterAttack: Uprising is a side scrolling space shooter (shmup). Team up or fight solo, 1 - 4 player local or up to 8 players online cross-platform coop, unlock upgrades, use powerful ultimate abilities, enhance your ship the way you want, and save the Earth from annihilation.

Farlight Commanders: Prologue is the first mission of an upcoming cooperative sci-fi shoot'em up. Play with friends up to 4. Drive a spaceship where each player has an unique role.

Dodge and encircle your enemies in this neon-drenched revival of the one-of-a-kind arcade classic!

Sky City, the free-to-play central hub of the AlterVerse, is now in Closed Beta. A new version of Disruption, rebranded as OutPost, and built on Unreal Engine 5 is in the works! Visit alterverse.com for details and early access!

Fight through relentless enemy waves in a fast-paced sci-fi FPS for 1–3 players. Choose your role, combine unique abilities, earn powerful upgrades, and adapt your build as you survive increasingly dangerous encounters.

Stardust Galaxy Warriors: Stellar Climax is a fast-paced couch co-op action shooter with SHMUP/Brawler gameplay and RPG elements. Choose your mechs, weapons & upgrades then soar through space, defeat evil & save the future... from itself!

Sky Racket is a game that mixes two classic genres from the Arcade era: Shoot’em up and Brick Breakers. In a world where you are unable to attack, using your racket to strike enemy bullets back at them is your only option! Bounce bullets back at your foes and save the galaxy!

Call your friends and lead your squad through the outer space and protect your planet from asteroids and alien ships on this local shoot'em up. Shoot, evolve e explode these space enemies.

A 3D arcade space shooter where you defend your base against endless waves of enemy ships. Earn credits, buy upgrades and perks between waves and fight Boss Waves a every few waves. Play alone, in split screen with up to 4 players on one PC, or online with friends.