Top similar games like Space intruders alliance:

A modern tribute to arcade legends! This shoot'em up arcade game revives the classics after 45 years with fresh graphics and innovative gameplay. Become a part of Space Ranges Inc. Join now! Get the high score!

Star Jet Alpha is a top-down space shooter inspired by classic arcade games. Progress through each stage by blowing up enemy space stations while avoiding or destroying enemy missiles, space mines and asteroids. Unlock Star Jet capabilities by completing stages.

Astragene is a roguelite shooter where you will have to survive each level facing hordes of aliens. Improve your abilities, choose new upgrades, and create reactions by generating combinations of powerful elements. Each game will be different, will you be able to adapt?

The galactic empire is under siege from the rebel scum in all directions! Fight through endless waves of rebel ships using all of the weapons and resources at your disposal as you execute your sole orders: to Crush The Rebellion!

lone.AI is a space RPG roguelite. With challenging, relentless gameplay, each run has the potential to boost your ship's power, speed, and more. As a lone AI, fight your way through the solar system and uncover the secret behind the ZOSMA, an alien race that holds power over the system.

Fight your way through the mega-corporation Galatico, the gatekeepers of the universe’s most powerful transportation devices. Destroy their infrastructure and blast your way to the top in this boomer shooter inspired FPS.

Pilot your advanced Trident fighter through a mysterious frontier, where survival hinges on skill, strategy, and an inexplicable alien bond. XERXES:SHADOW - Your mind is the battlefield.

This lightning fast arena shooter brings you right back to the highscore hunts of the arcade era. Use your arsenal of deadly weapons wisely against the increasingly ferocious monster hordes to survive as long as you can.

Progress through short levels to face enemies and final bosses to save your life. Win and you'll level up, fail and you'll level down. The whole galaxy depends on you!.

In this fast-paced retro FPS, you awaken in a Daedalus Industries mining facility near the moon Titan with nothing but the gun in your hand and a barcode on your wrist. Manipulate gravity while exploring mind-bending levels as you fight to escape with the help of a mysterious ally known only as 'Z'.

Blast through waves of alien enemies in Project AionIX! Master your piloting skills, dodge, and survive in this fast-paced space shooter!

Astro Fighters 2 is a vertical scrolling bullet hell shooter designed to test your skills with non-stop arcade style action. Use a variety of special items, power up your chosen ship and compete for the high score across 4 difficulty modes to be the best fighter pilot in the game.

In Mech vs Bugs, you'll pilot a mech to fend off alien insects on remote planets. Combining intense top-down combat with strategic looting and crafting, your goal is to liberate the galaxy, one insect-infested planet at a time. Ready for your thrilling, third-person adventure?

Survive in an ocean of bullets by dodging, shooting at your foes and manipulating time. You can take as much time as you need and even "do over": YOU set the tempo of the action. Will you be able to conquer the space station?

Arise Wyver and fly against overwhelming odds in this modern labor of love tribute to classic shoot'em ups!

Shoot at enemies in a WEIGHTLESS space station to save yourself from burning alive in the atmosphere!

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

Join Captain Rijk as he attempts to escape from the clutches of one of the most villainous species in the galaxy. Help to uncover the horrors that are being carried out on the fringes of the civilised galaxy and become the divine being prophesised to inspire an uprising and destroy The Domain.

The Nullblade Collection is a group of all the small, polished games made by Nullblade that were too small to be published by themselves.

This is a rogue-like top-down shooter where you control a spaceship that is sent out to explore the caves on the Moon. Once you enter the caves, you find out that there are enemies. It is up to you to survive against them while also trying to find the path down to the next level of the caves.

Appulse is the fusion between pinball, top down shooter and roguelite where you need to protect your mothership from invading robots. Each shot affects your ball's trajectory, allowing you to control it in the heat of the battle. Upgrade your equipment and conquer new spaceships to win the war!

Master a new way to fly and fight. Control every movement and engine burn. Simple controls, realistic flight: a game for space fans by a space fan.

Defend your planet against the Space Invaders. Build your defences against lovecraftian spacecrafts. Keep your health up and you might even become an invader yourself! Warning: this game contains flashing images that may make it unsuitable for people with photosensitive epilepsy.

Dodge, defend, and destroy! Engage in a frenetic shoot 'em up, facing relentless bullet streams that test your reflexes. Experience dynamic shifts between vertical and horizontal views as you fend off endless enemy waves. Use polarity shields for defense and strike back fiercely. Conquer the chaos!

Pulse laser battles between you and enemies.

Fight for survival in B.L.A.C.K - 1, a 3D FPS roguelike set in a dystopian future. Battle through procedurally generated spaceships using all your skills and resources, in Zero-G environments. Can you survive long enough to finally escape from enemy territory?

KILL. DIE. LEARN. LvL50 is a fast-paced first-person shooter where you need to beat 50 levels, in a row, without getting hit. Can you become a master and escape the lab?

This HEART-POUNDING WAVE-BASED ARENA SHOOTER catapults you into an alien-infested space station. SHOOT, SHRED, and SURVIVE as you crush enemy hordes, dodge chaos, and challenge yourself to set a new record. The battle escalates with every second—GET IN THERE and FIGHT!

Star Squadron is a next-generation space combat simulator delivering unmatched immersion. With seamless transitions, an interactive narrative, and our proprietary Voice Mimic System that personalizes dialogue to your actions, your choices, and your name, every journey will feel uniquely yours.

Supplice is a stylish throwback shooter inspired by the mid-90s FPS glory days and the legendary Doom modding community. Mixing the retro stylings of 90s era shooters with colorful graphics and frantic gameplay, it creates an experience that's ever so familiar but also exciting and fresh.

A top-down action game like no other. Use asteroids to block enemy bullets and smash enemy ships in this physics-based test of skill. Conquer 25 levels, vanquish 5 bosses, and maneuver through 5 tricky bonus waves.

Blood Aliens 3 is a cinematic, story-driven space shooter where every alien wave burns hope into defiance.

KLOSTYN is a sci-fi shooter that stays true to the late-'90s FPS style. The protagonist fights alien creatures and space pirates on a distant planet.