Top similar games like Nephenthesys:

Halo: Spartan Assault brings the excitement of Halo combat to Steam for the very first time. Battle your way through 30 action-packed missions against the Covenant as you explore the origin of the Spartan Ops program featured in Halo 4. *DirectX feature level 10 required. *

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.

Blast through waves of alien enemies in Project AionIX! Master your piloting skills, dodge, and survive in this fast-paced space shooter!

Welcome back to 1996! This shared screen space shooter is the perfect 4-player competitive game for some casual fun!

Grab the fate of all life in your hands. Blast your way through the cosmos, destroying monstrous cosmic beasts and the space cultists summoning them, on your path to stopping your mother from unleashing the chaos realm upon the universe, in this sci-fi cosmic horror bullet-hell, STARR RINGER.

Combining retro puzzles and a arcade space shooter. You and your crew found strange materials in the galaxy core to upgrade your ship to the most powerful. While collecting core materials you came across something unbelievable ... The Core Message. The Core Message changes everything.

Cosmo Chaser is space fighter action game which presents restless shooting battle. It demonstrates new style of vertical scroll shooter by presenting classic arcade action in 3D space.

A sci-fi twin stick shooter stripped down to the bare essentials with focus on smooth controls and satisfying action.

A retro-inspired 2D space shoot-em-up. Mine asteroids! Shoot alien saucers! Get rich or die flying!

Will you have what it takes to avenge your father, defeat the evil DreadSkull and save the galaxy? Collect gems and customize your ship to get through six replayable sectors, annihilate your foes and fight epic bosses in this classic styled pixel art shoot'em'up with RPG progression.

A fast-paced, top down movement shooter. A drifter must master the art of drifting, the nature of the enemy and the rhythm of attack and defence. Only then can a drifter become The Astrodrifter.

Beyond The Space Wall is a story-driven brick-breaking action game, enriched with RPG elements and other original features. In addition to the usual brickbreaking, you’ll face plenty of choices and side quests that directly influence the direction of the main story. Can you find the path to victory?

Repel extraterrestrial entities!

Fast top-down space shooter with varied missions, relentless enemies, powerful ship upgrades, and most importantly, fire.

Another version of the classic Asteroids game

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.

This is a retro space shooting game, where you only fight against the strongest enemy. There are 15 unique bosses in the game, and players need to use different weapons and strategies to defeat them. Dedicated to you who are both challengers and retro game lovers.

Play as one of 7 pilots in this thrilling sequel to a SHMUP classic. The time has come for a new generation of Psyvariars to rise… and save humanity.

Pawarumi is a modern shoot’em up set in a retro futuristic sci-fi pre-Columbian universe. You’ll take control of the almighty ship Chukaru and its three unique weapons! Shoot wisely to either do double damage, heal yourself or charge your Super Attack!

Battle aliens above the city of New York.

A fast-paced shoot 'em up where skill matters. Master over 100 ships, unleash powerful special abilities, and blast through waves of Invaders. Play a new mission every day and climb the world-wide leaderboards.

Escape corruption and deliver truth to the people in the only way you know how. as a space fighter pilot! You steal a ship and flee, it falls to you to duke it out in space and deliver truth to the people. Restore peace. Restore justice. Save humanity and Escape The Kreegan!

Fast paced Top-down shooter! Smartly use IRCM to evade the constant barrage of bullets and missiles and destroy everything that stands in your way.

Space Waver is an action-adventure-shooter space game, with a strong bind to comics. Become a space mercenary and experience his life through multiple contracts.

Alpha Force Zero is an intense top-down bullet-hell adventure that requires skill and planning. Utilize multiple weapon systems including an Auto-Turret with adjustable firing modes and unlock upgrades that you can equip in your ship to give you the upper hand. Dodge, fight, survive!

Enter the cockpit of your spaceship and prevent the destruction of our homeland! You and your friends have to dodge various attacks and fight many enemies. But your Twitch chat can support you in your defense and your subscribers can even accompany you as wingmen!

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.

Defender's Squad is a sci-fi vertical scrolling shooter 2D that combines 7 different levels. Play Solo and pick one of the 3 ships to kill enemies and save the earth from aliens.

Defend Spacebase 19 from the asteroids swarming down on the station! Shoot down waves of stones and equip different powerful weapons. How many waves can you last? A simple nostalgic retro arcade turret defense shooter.

Collection of a few arcade classics, remade with a fresh and friendly looking art style and a beautiful soundtrack.

Dodge and shoot your way through waves of enemies. REVO is a high speed, neon drenched space shoot ‘em up inspired by arcade classics of the 1980’s. Collect pickups, unlock powerful, ammo hungry weapons, and defeat giant bosses.

XenoFeud is an insane top-down twin-stick arcade alien shooter, where you must survive hordes of alien intruders while defending a mysterious object in space.

Gunstorm is a space shooter loaded with playability. Wave after wave of alien craft attack your agile ship. Use the mouse to control your ship at the speed of thought in a perfectly balanced game that starts easy and gradually gets more difficult.

Cosmoscope is a top down twin stick shooter with a twist. The game combines the frantic action of classic space shooters with unique kaleidoscope inspired gameplay. Tasked with defending Humanity against a mysterious alien race, you will need to use both firepower and your quick wits to survive.

The Last Archwing is a fast paced, vertically scrolling space shooter. Will you and your friends take up the mantle as Earth's last defenders and thwart the plans of the evil Emperor Zarkhan?

STAR SHREDDERS is a prologue to an extensive, story-rich SHMUP with strategic elements. Play as Clash, leading the Valkyrie force in the onset of an epic interstellar war. This teaser sets the stage for a larger adventure.