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?

A sci-fi roguelike shooter where aim and movement are unified into one mouse. Pilot a Simuler, command your ship, deploy escorts, and tear through colossal bosses. Easy to grasp, ruthless under pressure.

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.

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.

A mouse-only, endless sci-fi arcade shooter with dead-simple controls — just aim and auto-fire kicks in. Shatter asteroids into plasma cores, wield three upgradeable weapons, freeze time, and survive endless difficulty scaling.

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!

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'.

A fast paced bullet heaven, control your Sci-fi spaceships with semi-newtonian physics. Last 7 minutes against the drone armada until their boss arrives and fight your way to freedom! Use planetary gravity and other hazards to dodge superior numbers. Collect and combine weapons for maximum firepower

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?

Bend Time - Raise Hell! In this tactical shoot-em-up you can bend time to gain both defensive and offensive advantages. Use time-slowing Flux Energy to dodge enemies and their bullets, or to dominate and overwhelm the deadly bosses!

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!

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.

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

A linear danmaku shoot-em-up with some visual novel elements. Clear 6 stages across 4 difficult settings, each with unique enemy spawns, bullet patterns and boss phases. The game is structured to have each difficulty cleared in sequence, with the full plot unfolding across each one. 

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.

Magnetar is a top-down space shooter set in a unique physics-based environment packed with opportunities and hazards where you'll need all your skill to survive. Collect credits to upgrade ships and allies. Features 50 campaign levels and endless random levels.

Antiutopia is a fast-paced, skill-based multiplayer FPS set in a fractured sci-fi world. Built from the ground up in a custom engine by a solo developer, it delivers classic arena gun-play, tight matches, and pure competitive action. No progression grind, no gimmicks, just skill.

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!

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?

Pulse laser battles between you and enemies.

Free the solar system from the clutches of malevolent admirals in this sci-fi boss rush bullet hell game. Pilot your starfighter and defeat fleets and powerful battleships with your arsenal of weapons.

Star Squadron is a narrative-driven space combat simulator built for maximum immersion. Command your wing with freeform voice recognition and experience a dynamic campaign that calls you by name using our proprietary Voice Mimic System. Don't just play the game—live it.