Top similar games like Space intruders alliance:

A sci-fi wave-based shooter with roguelite elements. Collect powerful upgrades and unique combinations to wipe out hordes of bloodthirsty creatures and make your way into the Abyss.

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?

Blast aliens to pieces and start a rebellion in this fast paced pixel art top down shooter where sprinting kills.

Venture out on an ambitious mission across the galaxy with a simple goal - to save your home planet. Bask in the dazzling light of distant stars, flashes of plasma cannons, and explosions of enemy ships! This action-packed space fighting simulator is just the thing for a lazy Saturday night!

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?

lone.AI is an upcoming 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.

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.

BASILISK! is a dystopian sci-fi movement shooter where you move or you die, and your style meter doubles as your health bar. Parkour, hack, slash, and shoot your way to the center of Complex One, and unplug mankind's new AI overlord, the BASILISK, once and for all.

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.

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.

Launch the SYNC protocol, where you are the ultimate weapon. Your job is to commandeer different robotic synth’s abilities in a high-octane, first-person frenzy. Master the art of SYNCing, and control the pace of battle.

SuperOffice is an intense top down view shooter experience where time moves only when you move.

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.

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!

[Test Subject Name] is an FPS Platformer that sees you descend through layers of test chambers, fighting multitudes of robots along the way, using weapons taken from enemies, and coming in contact with intelligent machines that want you dead.

Fiery Rivaz - Reanimate Shmups !!! It's time to revive the shmup genre. You can expect a shooter that focuses on varied and innovative level design. It is accompanied by cool 3d graphics and a great soundtrack.

Sci-fi top-down twin-stick shooter with 9 weapons, 3 alts and secret hidden collectibles!

Solar Struggle is an arcade space shooter with a thrilling story and a challenging skirmish mode.

SPRAWL is a hardcore retro FPS set in an endless cyberpunk megalopolis. Escape the walled city and take on the militarized government of the sprawl. Fueled by the blood of your enemies and a mysterious voice in your head, make your way towards the spire to topple whatever lays within.

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

Be the cactus, become the legend! Master foes, evade traps, and uncover artifacts as a spiky hero in this unique indie FPS, blending classic elements with quirky new ideas.

Frantic 4-player laser ricocheting top-down shooter. Keep it casual and enjoy the chaos, or master the surprisingly deep mechanics to obliterate your enemies. Duke it out locally in free-for-all or 2v2.

Arcade Forever is a 3D vertical space shooter. This is an action game in which many enemies, obstacles and different weapons guarantee great fun. If you like fast space action, this is the game for you.

Astral Horizon is a first-person space opera adventure featuring combat with six degrees of freedom. Give orders to your squadmates and find creative ways to approach combat in zero-gravity. Explore epic sci-fi locations as you fight a war to uncover a perspective-shattering discovery.

Fight for your life against the incoming swarm of zombified astronauts in ASTROSWARM! Use a variety of weapons, turrets, and power-ups to survive!

In Alien Boom Boom you will send your enemies flying utilizing a powerful arsenal of weapons and upgrades. The game features a fully voiced story campaign, several distinct levels, several enemies, bosses and frequent player/weapon upgrades that are customizable at the start of each level.

Commander, your help is required in order to save the existence from extinction, join the adventure in solo arcade mode or in multiplayer. ------------- Destroy your friends in epic spaceship battles and steal their points in order to enhance & personalize your own ship once you return to your base.