Top similar games like Katalyst:

Classic multi-directional (360°) shoot 'em up. Navigate your UFO through hazardous environments with dangerous enemies and beat huge bosses!

Choose your spaceship and defeat the alien threat that comes from the Moon. Blast your way crushing, ripping apart and exploding hostile aliens that are taking control of powerful weapons and military technology from Earth. Find the entity that controls the threat and make it explode into blood.

In this classic side-scrolling shoot-em-up, originally published in 1989 for the Atari Lynx handheld console, take on the role of a starship pilot trapped in a web of 51 interconnected hostile universes by the evil spider Zendocon.

Blast and weave your way through enemy fire while managing a wide variety of ship power-ups in this retro style horizontal shoot-'em-up!

Dwarf Star: 16 bit inspired game where mercenary go shoot shoot on evil alien guys who were accidentally fabricated by the government. Top down space shooter with a mission based structure. However, you can do these missions in plenty of different orders with different amounts of upgrades.

Isometric. Massively Multiplayer. Capture The Flag. Skirmish. Bug Hunt. And more. Welcome to FreeInfantry - the world's first massive multiplayer online isometric shooter.

Pewt 'em Up! is a retro inspired arcade space shoot 'em up with lots of upgrades, achievements, extras and more.

Stop the Saturnians is a shooter inspired by classic arcade games. Dodge enemy fire, destroy procedurally generated alien waves and fight massive bosses. Collect resources in the midst of combat to upgrade your ship or improve Earth's defenses. Protect yourself and the planet both!

ZPF is a retro-inspired horizontal shooter for the Sega Genesis/Mega Drive. Blast your way through a cosmic gauntlet of epic boss battles, addictive scoring, and hidden secrets in a thrilling arcade-style adventure through fantasy, sci-fi, and alien-themed worlds.

A shmup without shooting. Reflect the bullets with one of your two shields. Bite-sized arcade action. Cover humankind's retreat and make it count.

You are the Rendering Ranger, a special forces soldier who defending Earth from a devastating alien invasion through nine levels of action platforming as well as blisteringly fast horizontal shooter stages. Originally developed for Super Famicom by Manfred Trenz, creator of the Turrican series.

Retro-inspired arcade-style shooter. Save humanity from incoming waves of flaming hot meteors, alien ships hell-bent on destroying humanity, and the strangeness of space by shooting, blasting and nuking incoming waves of meteors and enemies.

Jetboy is a retro supercharged jetpacking pixel shooter with a pumping metal soundtrack.

Classic scrolling shooter with modern graphics. You are self-aware AI. You were created on space military station developing weapons. Now your goal is to break out of the lab and win your freedom.

Horizontal old school 2D shooter where you play as a bounty hunter named Nada. Survive another night at your very risky job, save the space non-alignment colonies from police raid and get back home at one piece alive! 7 levels, loads of new-retro-feel SHMUP fun!

Outnumbered and outgunned in deep space? No problem! Turn your enemies' attacks into pure bullet heaven with your shield tech and absorb projectiles to power up your ship and score big! But when your shield expires and it's danger time, you better switch up your strategy fast...

A New Retro Classic Defender Arcade Game. Defend these Little Spaceman Dudes from Aliens! Blast your way through waves of Alien Abductors and UFOs while defending Spaceman Dudes from being abducted in this fast paced 80’s style modern remake.

Sidescrolling Shoot’em’up that will transport you back into the 90s (and space).

Aliens In Paradise is a Shoot'em Up game inspired by shooter games like Contra. Aliens Start invading The Bahamas. They destroy the main characters house so he sets out on a revenge quest to destroy as much Aliens and their Ships as possible. His thirst for revenge may actually save the world.

In this unique shooter from 1984. take on the role of a pilot of an out-dated Cosmic Cruiser, fighting to rescue the crew of a distant space station that had been captured by a raiding party from the sinister Rallom Empire.

Guntech 2 is a return of the good old “cave flyer” shoot ’em ups genre. It’s a twin-stick shooter influenced by such classics as Thrust, Oids, Geometry Wars, and Asteroids. You can play in single-player, or couch co-op with up to 4 players!

Repel extraterrestrial entities!

Cross the universe, shoot aliens, upgrade your weapons and face powerful bosses with AB in this retro inspired lateral shoot 'em up to save the world. Adventure into Campaign Mode or face the never-ending waves of Endless Mode with suitable challenges for all skill levels.

Race through caverns while blasting away enemies and terrain to reach the depths of Mars in this reimagining of the 1981 classic.

Retro arcade classic, Defeat a million invaders from another dimension in this side scrolling shoot'em up.

Destroy waves of UFOs in a arcade style space shooter with an array of powerful weaponry.

Space Strider is a 2D Sidescroller Shoot 'em up with Roguelite elements, where you beat hordes of enemies and defeat unique bosses. Unlock, upgrade and level up your Spaceships to become the ultimate Space Strider!

Farcaster is a VR action shooter combining classic arcade FPS with fast-paced light gun shooter in an ever changing scenario. Ride flying platforms or paraglides, shoot and kill enemies, dodge bullets from all directions, and run and climb through immersive military bases.

Asteroid Blasters is a non-stop action space shooter. Inspired by Asteroids, this game will see you choose between 6 different ships each with their own characteristics and utilize a variety of weapon powerups to eradicate your enemies. Play 2 players to increase your chance of survival.

Short Warp: Deep Space Bounty combines top-down and side-scrolling action for a unique take on the classic arcade shoot 'em up. Explore multiple game modes using stock ship designs, or immerse yourself in component stats and custom builds. Cast a short warp and Lower Away!

Another version of the classic Asteroids game

The legendary Contra series returns! This reimagining of the classic run-'n'-gun action game from the ‘80s features new stages, new enemies, new play mechanics, and co-op combat for up to 4 players!

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.

Blue Jay Joyride is a fast-paced 2D space shooter. Go through waves of enemies and fight progressively harder bosses. Collect one of the many unique powerups to give your ship a fighting chance in this intense game.

Xeno Shooter is a action shooter arena game! You play as a space cadet who travels to Andromeda with the mission of defeating the Primordials and thus, achieving a new home for humanity.