Top similar games like Gatekeeper:

DEEP ROCK GALACTIC: SURVIVOR is a single player survivor-like auto-shooter. Take on hordes of lethal aliens, mine riches, and unlock powerful upgrades to survive, as you wield the full arsenal of Deep Rock Galactic. It's one dwarf against all of Planet Hoxxes!

Space Ace is a 2D top-down shooter that focuses on upgrading your ship to fight through levels of Bosses and smaller enemies. Play with keyboard + mouse or Xbox controller.

Vital Shell is a single player survivor-like that puts you in control of mechs inspired by classic fantasy archetypes. Unlock powerful synergies with unique weapons, traits, and abilities as you take on increasingly challenging waves of enemies in a shattered, dreamlike realm.

Gather a squad and fight for survival in We're All Going To Die. Work together with a squad using abilities, equipment and exploring different levels to make the most of your fight against your demise, after all, you're all going to die at some point.

A top-down bullet hell space shooter that will test your perseverance. Blast and shoot your way through hordes of asteroids, enemy ships and whatever (and whoever) else you'll run into on your journey! Supports local co-op multiplayer over your local network.

You should simply try out Roboom. We have quite a long description below, you can read if you like, but experiencing Roboom yourself or as Co-op is the best.

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.

Ghostslayers is a wave-based top-down coop shooter where you slay the ghosts with magic and couple thousands of bullets... Or punches, or slashes, or explosions. Use the varied weaponary, spell cards and abilities, combine them together with your allies for more power and get through the city.

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.

Under Dead is a challenging auto-shooter horde survivor roguelike where you fight to survive as many days as possible. The dead have risen, and they get stronger every day, but so do you. Collect items, level up, and craft powerful and unique builds. Become a zombie-killing machine!

Nebula Cleanup Crew is a top down action shooter with a focus on hot and cold weaponry. Blast enemies and bosses away in multiple regions with super heated and chilled weapons — freeze foes, overheat them, and unleash powerful thermal special attacks while upgrading your ship's abilities!

Unleash the fury of giant capital ship combat and conquer the stars!

Starship Troopers: Extermination is a 16-player co-op FPS that puts you on the far-off frontlines of an all-out battle against the Bugs! Squad up, grab your rifle, and do your part as an elite Deep Space Vanguard Trooper to take back planets from the Arachnid threat!

This roguelike spaceshooter pits waves of enemies against you in your pursuit to reach the end of the galaxy. Improve your ship with permanent upgrades and select temporary upgrades during a run to pursue achievements and and kill bosses.

Reaper Hunt: Survivor is a single-player top-down action roguelike shooter blending dark magic and dynamic combat. Choose your hero, upgrade via card-based perks and a skill tree, brave portals to deadlier realms, and conquer relentless bosses in a world where every second counts.

CYBRID: Survivor - is a single-player shooter with survival elements. Use your entire arsenal, fight hordes of robots, mine resources and unlock powerful upgrades as you clean up the streets at night. You are alone, against everyone!

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.

Slingbot Survivors is a survivor-like auto-shooter with physics-based platforming. Explore a hostile alien planet, use your grappling hook to zip around, and wield an arsenal of powerful weapons & gadgets to wipe out hordes of alien horrors!

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.

Mechanophagia is a challenging bullet hell shooter with roguelite elements, set in a dark and gritty sci-fi world. Blast through waves of fleshy aberrations and defeat monstrous bosses. Can you outmaneuver the relentless enemy onslaught and save the robots from their inevitable extinction?

Classic Asteroids® updated with modern gameplay and perfected controls. Explore hazardous environments and sneak around asteroids to surprise attack giant bosses. Upgrade your ship to use additional power-ups. Single player or fight with up to 3 friends with intense local coop.

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.

Kuiper belt survivor is an arcade style bullet heaven, where every run is endless. It brings a unique spin to the bullet heaven genre by making every part of the players weapon arsenal customizable with well over 10,000 unique weapons to build, and unique stats for every enemy.

Saucers is a rogue-lite top-down twin-stick arena style shooter featuring extensive weaponry and upgrade paths so that every run is unique. The further you get, the more weaponry you can stack up to devastating effect. THIS GAME REQUIRES A TWIN STICK GAME CONTROLLER TO PLAY.

Take on the role of a soldier capable of facing the most dangerous enemies, improving your skills to increase the chances of victory

Survive in space in this action roguelike with RPG elements where you use your strategy to combine design, weapons and passive skills, shaping your ship in your style, facing increasingly powerful enemies.

This lightning fast arena shooter brings you right back to the highscore hunts of the arcade era. Use your arsenal of deadly weapons wisely against the increasingly ferocious monster hordes to survive as long as you can.

Cards and Guns is a top-down arena shooter roguelite, where you’ll have to defeat hordes of creatures. Choose from a variety of cards and upgrades to create unique builds and survive to the end.

Choose your ship and command it against an army pitted against you in this wave-based arcade-style bullet hell space shooter. Fight for as long as you can with powerups acquired through the catalog, and blast through everything in your path.

Collect synergizing items to create an overpowered character to fight hordes of cyclops monsters. Cyclo Chambers is a fast-paced, top-down arena shooter with light rogue-like elements. 150 items to choose from to create frantic combinations. Different runs every time.

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+!

In Mech vs Bugs, you'll pilot a mech to fend off alien insects on remote planets. Combining intense top-down combat with strategic looting and crafting, your goal is to liberate the galaxy, one insect-infested planet at a time. Ready for your thrilling, third-person adventure?

Core Breach is a fast-paced, twin-stick arcade shooter in a pixel art style. Play as a Trojan worm virus, outmaneuvering and destroying antivirus enemies. Upgrade your worm with powerful attacks and skills as you fight to breach the CPU core and uncover its secrets