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.

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!

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.

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

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.

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.

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.

Progressively insane side scrolling roguelike shooter adventure that gets crazier and crazier the more the player plays.

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.

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!

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!

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!

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.

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!

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!

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.

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.

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

Roguelite replayability meets FPS action in Rogue Weapon as you clear enemy outposts and try to escape your captors. Whether you do so quietly or with pure chaos is up to you.

Survive the Rift is a roguelike shoot 'em up with procedurally generated levels, unlockable ships, and plenty of items to make each run unique. Inspired by classic 16-bit era scrolling shooters with modern roguelike game mechanics.

Last Star is a space shooter roguelite with tower defense elements. Pilot a spaceship to protect your solar core from endless waves of alien invaders. Upgrade both your core and spaceship to become unstoppable. Execute tactical counterattacks against alien motherships to slow down the invasion.

Play as a bot for hire and complete contracts in a Third-Person traversal shooter with Rogue Lite mechanics. Run on walls and use your grapple gun to traverse and hunt down rogue bots who have conquered a city.

A game about exploring space in search of hospitable planets for colonization. Casual gameplay and short rounds make it a great option for killing a few minutes.

Heavy Bullets is a randomized FPS dungeon crawler where players make their way through a colorful maze, while protecting themselves from aggressive creatures and malfunctioning security devices. The goal lies at the end of the 8th level, where they must reset the security mainframe to restore order and reap the rewards.

Soar through the sky islands of Alioth and defeat any foe standing in your way using your piloting skills, unique abilities and powerful weapons. Airhounds is an aerial dogfighting rogue-like focused on fast-paced action!