Top similar games like Operation Ninurta - Eris Portal:

Die After Sunset is a 3rd person action rogue-lite shooter with a unique mechanic featuring light and darkness. Battle for Earth and travel through time as you defeat hordes of enemies and complete random quests to create the best build possible. Can you solve the mystery behind the Murkor invasion?

Fight through alien worlds, obliterating relentless foes, and forge your own path to unlimited power. In this third-person roguelite shooter, harness the power of deep customization. Adapt, experiment, and break the limits of power as you carve your legend across the stars.

Explore, mine, and fight your way through the galaxy in this 2D space mining adventure! Unearth the relics of ancient civilizations and face the horrors that linger beneath alien worlds.

Dark Galaxy is a fast-paced action roguelike top-down shooter. Pilot a space drone to battle an invasive insectoid species. Illuminate the darkness and grow stronger as you travel to different star systems. Can you free our galaxy from the invaders?

Pilot Force Simulator throws you into the heart of a chaotic space battle. Dodge waves of bullets, feel the thrill of near-misses, and unleash powerful attacks in an intense, fast-paced fight through the stars!

Sublevel Zero Redux is a roguelite six-degree-of-freedom shooter in a universe where reality is falling apart. Use your zero-g gunship to fight through a vast underground facility, looting advanced weapons to destroy hordes of deadly enemies.

Spaceflight action for the new age! Push your piloting skills to the ultimate test, blast and burn your way through swarms of starfighters, merciless armadas and colossal behemoths in an epic roguelike campaign that spans the cosmos. Easy to learn, tricky to master, and impossible to put down.

Fight against the clock in this action-packed roguelite shooter! Loot and stack hundreds of items, complete unique quests and battle colossal bosses at sunset. Fight, die, level up, and overcome!

Survivor: Spark is the first episode of a series of anti alien invasion games. It's a classic transcendental third person shooting game!

Stranded in an unknown galaxy full of escaped prisoners who grow stronger with every passing moment. Build a space station, upgrade your ship, and dogfight your way out of the galaxy. Take risks when necessary, but don't forget that you only have one chance.

Heat Signature is a game from the developers of Gunpoint where you break into spaceships, make terrible mistakes, and think of clever ways out of them. You take a mission, fly to the target ship, sneak inside, and make clever use of your gadgets to distract, ambush and take out the crew.

Deep in the vast galaxy, you are the last survivor. Waves of enemies keep coming, and the universe is filled with unknown dangers. Your only mission is to survive within the limited time. Pilot your spaceship to fight, gather resources, and upgrade your weapons and abilities.

Astral Flux is an action-platformer with roguelite elements where each run is different. Traverse hostile alien planets, discover dark secrets, and face powerful foes in combat.

Beyond Lost Planets is an intense Roguelike Dungeon Crawler Bullet Hell. Fight through enemies and bosses across procedural worlds. Everything from weapons and bullets to powerup and companions is represented with cards. Grow absurdly powerful and create wild, unique synergies every run!

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?

A 3D Sci-Fi space shooter game where you fight against big flagships and bases to unlock the secrets of the world.

Run and Gun Roguelite where the goal is to upgrade each consecutive alien drone on death so the next can strive to become overpowered enough to escape the all consuming hive mind.

Cryptark is a 2D sci-fi shooter where you take on the role of a heavily armed privateer seeking to earn government contracts by boarding deadly alien space-hulks. It's up to you to strategize a plan of attack, pick an equipment loadout, and destroy the central core to be victorious.

Shifter is a third-person action game where you shift the direction of gravity, fight enemies, and run/fly/fall around a complex procedurally generated dream world. It has unique boss fights, weapons, skills, enemies, and more! Your dream is hacked through a microchip, and you have to wake up.

"Infiltrate mysterious planetary facilities to snatch the core 'Hug-Dung' and escape. Battle giant robots and alien creatures in 4-player co-op, secure the core, and return to the extraction pod in this sci-fi action experience."

Fight fierce hostile alien space ships to neutralize their defenses before you board their ships and battle intense on-foot encounters. Eliminate their forces and steal their technology to upgrade your squad with different abilities and save the galaxy!

Our brave hero Abda lost his father. After his death, he remained the only one of his kind. Everyone he loved died. After the funeral, he inherited his father's old starship. After fixing the flying saucer he had inherited, Abda got ready to go. Thus began the story of Abda Redeemer.

HYPERDRIVE is a fast paced Sci-fi action flight sim, combining the infinitely looping gameplay of a roguelike, along with the combat and controls of classic spaceship combat. Avoid obstacles, and take down enemy ships in high speed space combat, all while making as many deliveries as possible!

In this top-down roguelike shooter game you go through levels of enemies to defeat [???] which escaped from [???]. You do this with the help of weapons and items you find on the way. You can equip up to two weapons. Mix and match the weapons and items you find to make combos that work together!

Oftalmogarden is a fast and chaotic roguelike sci-fi eyeball monster shooting game. Shoot your way through hordes of enemies, collect upgrades, weapons, and gadgets to grow stronger, but accumulate curses over time. Speed is your best ally to survive, the sky is watching and death will not wait.

Cryptrunner is a hack and slash shooter with roguelike elements. Enter the Crypt, blast and slash your way through monstrous foes, and delve deep in search of ancient fortunes. Once you enter, there's no turning back. The only way out is found below.

Scrap Seas is an action-roguelike shooter about customizing your murder-boat to battle robots, dieselpunk pirates, sea monsters, and huge bosses! Travel through a generated campaign of fast-paced battles, broken up by shops and random events. Just don’t die, because death is a permanent condition!

Annihilate endless hordes of aliens in this action-packed sci-fi rogue-lite. Acquire a variety of firearms and upgrade your equipment to fulfill your mission.

Defend against the alien invasion and take down the mother ship! Utilise branching upgrade trees, unlock new ships, and equip permanent upgrades to create your own unique build and defeat the growing hordes of invaders in this sci-fi action roguelike!

Ever dreamt of being a space potato? Now’s your chance! This is the prelude for Space Gladiators, a 2D hand-drawn roguelite platformer following a bunch of captives fighting their way out of a planet prison. Defeat hordes of aliens in the gladiatorial arenas and earn your freedom!

Star Devil is a Sci-fi Station Survival Roguelike Game with dynamic alien infection. Playable in both single player and split-screen co-op.

Point, shoot, mutate, survive. Fight through a hostile industrial orbit in this fast-paced pixel-art action roguelite. Aim with the mouse, survive deadly machine enemies, and shape each run with powerful mutations.

Play as Psych, while he escapes from a research facility run by evil slugs as they attempt to harvest him for his psychic powers. Face the evil slugs and survive the lab! Watch_out_for_Failed_Experiment