Top similar games like Gamma Zero:

A vertical arcade shoot'em up with an inventive teleport system, lots of fast-blazing action and explosions, tons of boss fights, a risk/reward based score system and a proper challenge for both veteran and new players of the genre.

Neon Fighter is a tiny arcade game packed with lasers and explosions, in which every few seconds you are forced to switch weapons automatically, making you have to adapt quickly to the new situation and re-evaluate your perspective.

This is a rogue-like top-down shooter where you control a spaceship that is sent out to explore the caves on the Moon. Once you enter the caves, you find out that there are enemies. It is up to you to survive against them while also trying to find the path down to the next level of the caves.

Soar sky-high in Raiden III x MIKADO MANIAX, an electrifying entry in the classic arcade shoot-‘em-up series! Customize your music, wallpapers, game mode, and more before launching into high-octane aerial action!

Super Forklift 3000 is an arcade space shooter with a twist: you drive a forklift that carries and shoots up to three boxes. Defeat enemies and bosses while managing your different box types. Be careful not to run out of ammo!

A sci-fi shoot'em'up game with heavy focus on upgrades experimentation, featuring two unlikely heroes that must work perfectly together, despite their share of secrets, to surpass their limits and succeed in eliminating a threat that might destroy both Earth and Andraxia if left unchecked.

You've been dropped into enemy space. Weave your Starfighter between alien spaceships, lasers, asteroids and bombs destroying as many as you can and collecting valuable coins and powerups as you go.

Gratuitous Shooty Game is a hobby space shooter made by the developer of Gratuitous Space Battles, reusing the art from that game :D.

Blast hordes of alien ships into junk. Collect the scrap to upgrade your ship into an unstoppable force of destruction. Destroy bosses to choose new weapons to bolt on your ship.

Void Prison is a fast paced, endless arcade twin stick shooter that puts you inside of an ever shrinking ring. Survive by fighting emerging enemies around you and don't get consumed by the void. Complete achievements to unlock new skins and powerups and get on top of the leaderboards!

A stylish sci-fi arcade shooter about cleansing the galaxy of pesky demons! Cosmic Cleaner is a fast-paced, high score chasing action game that progressively gets more challenging. Designed for quick and easy fun.

The SPELP program needs YOU to annihilate thousands of aliens with a variety of weapons, members and unique capacities. Unlock characters and make up your own team to fit your playstyle.

The humanity succumbed against the power of a aliens intergalactic empire, but managed to organize and establish a resistance army. Join the rebellious seekers of peace and help them defeat the evil that haunts the Earth.

Customize your Gun Bots to fight through 7 unique worlds with different weather conditions that become more challenging as you progress.

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.

Thetawave is a physics-based space shooter with procedurally generated levels, diverse foes, and distinct characters.

A fast-paced addicting space shooter with an inspiration taken from many modern games. A project I have been passionately working solo for 2 years+!

Stellar Space is a new take on a classic arcade game with a modern, rogue-like, form for new players to enjoy!

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.

In this highly addictive top-down arcade shoot-em-up from 1982, originally for the ZX Spectrum, defend yourself from wave upon wave of deadly alien combatants using your Ion Thrust Drive and dual Plasma Disruptors.

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.

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.

lone.AI is an upcoming space RPG roguelite. With challenging, relentless gameplay, each run has the potential to boost your ship's power, speed, and more. As a lone AI, fight your way through the solar system and uncover the secret behind the ZOSMA, an alien race that holds power over the system.

Solitarius is a 2D top-down wave shooter set in a sci-fi space environment. It is a free minigame that contains six different levels, eight different enemies and nine different weapons. Instead of surviving as long as possible you have to make it through each level.

Armored Firestorm is an intense top-down shoot'em up action game in a futurist environments. At the controls of your Hovertank, survive against the attack of the machines in the orbital city of the federation.

Test your skill while trying to unlock all ships by fighting on 6 unique maps full of different kind of enemies!

Escape from a tyrant government and save the planet Shambala. Be the resistance! Starexcess is a retro-looking vertical shoot 'em up inspired by the 16-bit era. Take on enemy armies and dodge frenetic shots in this shoot 'em up for one or two players in a local ofline co-op.

<DESTROY> enemies. <COLLECT> orbs. <COMPETE> on leaderboards. <INITIALIZE>

"Lost Colony" is a Twin-Stick Shooter Action-Roguelike set on an abandoned space colony. Guided by your drone companion, you must explore the planet and defend yourself from the swarms of aliens and the corrupted colony security system. Will you uncover the secrets of the Lost Colony?

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.

Welcome to an epic world of endless carnage, where you battle alien foes at lightning fast speeds, and engage in mind meltingly epic boss battles. Immerse yourself in a beautifully hand crafted world, with visually stunning top down graphics and unlimited action packed levels.

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.

Get into the cockpit of an ace pilot fighting in the galactic war in this sci-fi arcade top-down shooter. Participate in numerous campaign missions to explore the story of Magnificent-1 and enjoy the arcade mode to strive for the highest score.

Buckle up and blast off with Raiden IV x MIKADO remix! This classic arcade shoot ‘em up comes fully equipped with new music, battle modes, vertical screen play, and more!

A top down 2D space shooter bullethell with roguelike elements awaits you. Dodge, weave and shoot your way through waves of enemies while gaining upgrades trying to survive as long as possible.