Top similar games like Nucleuz Underground:

The earth has been invaded by aliens, and even though they are still in training, a group of soldiers are trying to save their city while trying to understand why it happened so quickly.

Little Red Rocket Ship is a bullet hell game with shoot-'em-up and platforming sections, featuring challenging but short levels and multiple weapon and ship options.

The game is a story-driven 2D platformer, with some Metroidvania aspects, where the player determines the outcome of the game based upon their “Morality” score, which itself is based upon the player's decision to kill in the game.

Harness the power of dark energy as you jump, slash, shoot and bombard your way through an army of alien soldiers and killer robots in an arcade style, twin-stick shooter with a slick 80's synthwave soundtrack.

"Havoc Runner" is a futuristic action and 2D platform game that will take you to Titan's moon to face killers robots, missile launchers, and automated weapons in a hostile environment where you must find and destroy the Tupan computer, preventing a missile attack on the planets of the solar system.

Bazooka Cat is a platformer made with love inspired by old-school games of the 90s with the use of new technologies and game logic, but what if you add something like tactics to the platformer?

Inspired by old NES games, Ragnar is a 2D run-and-gun action platformer that will be difficulty and fair. We would like to bring back the classic and retro feel to modern platforms and a new generation of gamers.

Penguru is a hack and slash game where you play as an angry Penguen. Choose your weapon from various options. Shoot, blow, cut and rip your way through waves of enemise. Reload and rest at the belly of a whale. As long as you present a Guru Level of Shooting you are welcomed at Penguru universe.

Jett Rider is an arcade shooter packed with action, exploration, RPG elements, tons of humor and awesome bosses. Explore, fight, gain experience, purchase weapons in this exciting adventure.

You find yourself in a futuristic dystopian city. You get the idea: Dark smog. A rogue A.I. Corporate drones. Actual drones. The whole enchilada. In this fast-paced 2D platformer, you play as Arisu, a Runner tasked to deliver the ambiguous Blue Rabbit "packages" around the city.

Explore a cyberpunk universe where monkeys rule. Challenge the fearsome Cyber Monkeys as you take on the role of a hero armed with a living shark weapon.

You found an old game console along with some games at a garage sale. You remember playing these as a kid, and couldn't resist getting it. Maybe you could give them a whirl, just for old time's sake?

What, you can easily pass all the obstacles you face? So, are you our last hope? So, do you want some absurdity? And are you doing all this to beat the ZUMBEKUKKA at downstairs? Dude, you are really brave!

The two primordial colors of pixels start a war after years and years of "Peace", many things have happened in this castle that is now being attacked by larger forces, will you as the King of this city let them destroy everything that is yours? WARNING: If you give up easily, don't buy this game.

Super Slinger is a cute and funny pixelated arcade-like shooter where you fight against the alien invasion in an attempt to send them back home. Cute art, juicy gameplay, difficult stages, and SLINGSHOTS!

Sect-Machina is a fluid, atmospheric bug-themed metroidvania rendered in a vibrant 2D pixelated style, crafted with meticulous attention to detail in its combat, characters, environments, sound, and story.

Sentinel Attack will have you play as both Justin and Erica in horizontal shooter and metroidvania stages as you battle in space and explore the many levels of the Sentinel station.

Unite the FELLAS and fight for FREEDOM!

“ Do You Like Dying ?” Lucky Joe is a unique action game that combines shooting and platforming in 60 large 2D levels. Core gameplay easy to learn but hard to master, intense gunfights, a touch of humor, tons of enemies, a bit of reflection, great sound tracks… Try, die and retry...

Moonless is a challenging side-scrolling platformer in the style of classic arcade games of the 1980s, where you control a helpless astronaut who has been left stranded on the moon, and now has to face an invading alien force to earn a chance to go home.

Explore and uncover the mystery of this enormous spaceship by shooting alien creatures in this Sci-Fi Action/Adventure Metroidvania.

Battle against players around the world with the online matchmaking mode!

Welcome to Cone Flyers Mercenaries! Fight many dangerous enemies, delve into deep dungeons, and pilot your cone ship with precision platforming and a unique combat system in this tough as nails bullet hell.

A new era of physics based platforming is about to begin. Play as fusion powered killer android Lazr, facing off against rogue AI and mega-corporations in Alpha City One.

Xenosis is a thrilling metroidvania where you traverse an ancient temple that has been overrun by alien creatures. Armed with your blaster, you must combat a variety of challenging enemies and upgrade your weapon to escape

A retro style mini metroidvania game during Old West about "El Gatito", a lovely little "Pistolero" cat who needs to defend his hometown from evelish mutant vegetables!

Brutal, savage, acid 2D action, where skill of shooting and movement need to be win.

G WARRIOR is a retro hardcore action shooting game. Pick up the gun and destroy all robots and aliens. Fight in colorful scenes such as snowy mountains, caves, seas of fire, alien lairs, etc.! !

Help Tom hack-and-slash his way though a dream from which he cannot wake up. A hand-drawn action-adventure through a dreamy world filled with fleshy monsters, insane situations and strangers that needs help.

Welcome to a world that is full of danger, and your task is to destroy all enemies on your way in the original Run and Gun style!

Help ranger Riki to fight an unknown menace which could destroy not only the Amazon forest but the entire world. A fast and yet challenging game.

Explore an abandoned planet, find upgrades, build your character and reveal the truth about what happened to the planet and its people.

Battle your way through many levels in an epic journey to free your country from an enemy invasion in this 2D action game. Gather gold and buy more stuff, that you would not buy in real life.. like a double barrel shotgun with split-in-two-fire-two-ways mechanism! Or even a Jet pack!

Boom Blaster is a hand-drawn, side-scrolling shoot'em up with intense boss fights! Blast your way through each level with a range of weapons and unique hero abilities in this exciting and challenging action game.