Top similar games like Protocol Omega: Resist and Survive:

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.

lone.AI is a 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.

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

Surviving is only half the game. The award-winning atmosphere and gameplay mechanics of the original Shadowgrounds make a triumphant return in this spin off/sequel armed with a slick new feature set! Shadowgrounds Survivor tells the story of the last remaining humans on Jupiter's moon Ganymede, where the alien onslaught is in full force.

Darkship Echoes is a tense, atmospheric sci-fi top-down shooter where you pilot a remote drone through a dark, derelict space station, using radar to scan for threats, fight rogue machines, and scavenge supplies to survive.

AstroWars is a top down 2d shooter with monsters and a blue gun. Earn score by killing monsters and try to beat your top score.

Become an agent of vengeance in this bullet-heaven action roguelite! You are the lone survivor of your squad, on an alien planet with just your weapon, a jetpack, and the courage to keep fighting. Kill off alien swarms and transform their valuable guts into explosive upgrades and vital utilities.

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.

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.

A challenging top-down survivor game where your mind is your greatest enemy.

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

Repel extraterrestrial entities!

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. *

A【Pixel style, rouge、type horizontal、 shooting、 defense 】 game

Save the galaxy in this unique space shooter! Based on the legendary Google Play title, Super Space Slayer 2 features completely re-designed mouse, keyboard and gamepad controls that make it even better than the original.

High-speed shmup where survival meets rhythm. Evade waves of enemies to pounding drum and bass soundtrack. Compete globally or battle friends in co-op/PvP. Customize your ship, perfect your run, and claim your spot on the leaderboards.

Earth Space Defenders is a starship twin-stick real-time shooter action game. Experience story of menacing green smoke that plagues whole universe. Supports steam multiplayer and party play with multiple controllers.

Fly around, mine resources, expand your ship, build weapons and fight off aliens!

Embark on a fast-paced action journey through space, discovering new weapons and abilities through acquisition and research to better each run. Invite friends to experience it with you!

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.

Welcome to Solitary Sentinel, a captivating modern reimagination of Space Invaders and Missile Command, where you must defend against constantly evolving enemies by upgrading a single Sentinel. Enjoy simple controls, and deep strategic gameplay as you fend off the relentless onslaught!

Protecting Us From Incredibly Worrisome Extremely Hostile Oddities...is what you will be doing with your football! Defend the Earth from the invading disciples of the Deranged Octopus, and learn the ultimate secret of the Universe.

Be THE Cowboy in this top down shooter that allows you to upgrade your health, dash speed, and sword strength, as well as 19 weapons, with the souls you collect from your slain enemies!

Warspace 2 is a 1-4 player CO-OP space shooter with RPG elements, open-world and procedurally-generated galaxy. You can trade, craft, and fight your way through a universe, either solo or with friends.

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.

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.

Join Captain Rijk as he attempts to escape from the clutches of one of the most villainous species in the galaxy. Help to uncover the horrors that are being carried out on the fringes of the civilised galaxy and become the divine being prophesised to inspire an uprising and destroy The Domain.

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.

Captain a starship in a thrilling 2D shooter, dodging asteroids across galaxies. As you journey to Axios Station, each galaxy's challenge intensifies. Can you navigate the cosmic gauntlet?

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!

Star Jet Alpha is a top-down space shooter inspired by classic arcade games. Progress through each stage by blowing up enemy space stations while avoiding or destroying enemy missiles, space mines and asteroids. Unlock Star Jet capabilities by completing stages.

Use your ship to explore a massive galaxy. Land on planets and gather resources to maintain and upgrade your ship! Invite your friends to help and set up jobs and missions.

In this game with elements of roguelike, RPG and Bullet Hell, you control a ship with the power to absorb enemies and improve itself, but even then it won't be easy, because you'll face the hordes of enemies with a good variety of weapons that come randomly as you pass level.

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