Top similar games like Ozone Guardian:

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.

Space Survival is the next great SIMPLE 2D casual space action shooter where you have to defend against wave of enemies, have fast reflexes and strong will to win. It is great way to relax, but also a great challenge. How long can you stay focused?

Space fight arena is a retro arcade based arena shooter game that was modeled after legendary arcade games. This game retains the fun, addicting aspects of those arcade games while also adding on new, awesome features such as challenges, skins, and a world wide leaderboard.

Discover a short story where you will have to answer questions to overcome the challenges it presents. It is a mixture of bullet hell with hundreds of enemies and graphic adventure, where choices influence the plot.

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.

Mow down the alien hordes, scout for resources and survive. Dreadnought is a mix of Action Tower Defense Survival and Shoot 'Em Up Bullet Hell where you control the ships turrets & defend against waves of enemies. Choose your weapons, upgrade your ship & brace yourself, the horde is coming.

Void Vikings is an arcade style top down space shooter where intense action is the focus and choosing the right education could pay off. Smartly manage your Space Bucks in order to destroy your student loans before you die. If you succeed your score could sing your praises through all of Valhalla.

You must do your best to protect the world! Destroy all enemies. Get the highest score.

Corrupted Beats is a rouguelite top down shooter game. Survive the waves of enemies spawning and reacting to the beat of the music pulsing around you as you create and manage unique builds of various items and weapons to become unstoppable and tame the corrupted music.

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

Tankron is a top-down wave survival roguelike in which you fight an ever-increasing amount and variety of enemies. Choose from a variety of upgrades to stand a chance. Discover and choose between different tank specializations to enhance your Build.

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 your way through waves of space debris in order to reach what is waiting for you on the other side. Find your fighting style with multiple unlockable ships in this fast paced space adventure!

In Astrum Vanguard, a captivating 2D arena shooter, you pilot a spaceship through space as countless enemy ships and alien creatures relentlessly attack you. Survive the endless onslaught in the cosmic battlefield!

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

Dodge and destroy enemies and asteroids to get food and grow bigger! Be careful though, the game only gets harder over time. Deal with incoming bosses and find yourself your own unique strategy with the attribute system! Change up the gameplay with different stages and characters to choose from!

Neon Arena is a space arcade scoring arena game.

It’s time to cluck around and find out. Gear up and pull on the helmets of the Battle Roosters, a hotshot space brigade of poultry with panache. In this quirky, roguelike, bullet hell adventure you’ll combine weapons, upgrades and killer strategies to recover space’s best taco ingredients. Bwark!

Void Drift is a survival roguelike space shooter where you explore unque battlefields, evolve powerful weapons face relentless enemy swarms and take on bosses, adapt your strategy, and survive the chaos of the void!

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

ionAXXIA introduces the ‘big brained shooter’ genre with a tactical arcade space shooter. Classic 90's inspired sci-fi action adds a whiff of Dark Souls to its varied-weaponry combat, pairing a need for quick reactions and gaming skills with patience, timing, and smart decision.

Swarmhunters is a top-down arena action shooter. The war between human and bugs has become worse - Project Swarmhunters emerged at this situation. You play as the best space soldiers in the galaxy and your mission is to strike the hive and hunt down the Emperor, supreme commander of bugs.

Survive in the deep void of the galaxy against thousands of invaders! Nebula is a challenging bullet hell, twin stick shooter where you have to face endless waves of space enemies. Additional map resources and space drones can provide you a support but be wary, they can as well become a deadly trap.

Xenoraid is a vertically scrolling shoot'em up with procedurally driven missions and detailed shooting mechanics. Modern features such as real time fighter switching and squadron management make Xenoraid a fresh and thrilling shooter!

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.

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

Get Off My Space! is a tower defense game where you rely on skillful tower placement and resource management to beat upcoming dangers of the galaxy. Combining strategy and micro-managing fire groups, you will overcome the hardest level objectives.

Scavenge modules, combine them in the deadliest and most efficient ways imaginable, and fly your very own spaceship through alien space with BossConstructor. Thousands of procedurally generated galaxies await you and your space-faring collection of assembled modules to explore them.

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.

2D space shooter and turret defense come together to create the Planetary Defense System this world needs! Shoot down asteroids and aliens and survive the bosses in this arcade like game featuring customizable satellites, projectiles, and upgradable Cannon and Planet Shield systems.

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.

1000 Waves is a bullet hell arcade game that becomes progressively difficult as you approach the 1000th wave. Strengthen your ship by leveling up and conquer the final boss!

The Squids are here - but your soldiers are ready. Grow your squad up to 4 members by rescuing survivors. Obtain the best weapons, support, and equipment you can by gathering Squid Samples. Become a force to be reckoned with, one the Squids will fear for generations to come.

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.

Impact Trial: First Encounter is a exciting mix of bullet hell and narrative adventure in a retro sci-fi world. Face waves of enemies, make story-affecting decisions, challenge yourself with various difficulty levels... and more secrets. ¡Your story, Your choices!