Top similar games like Code: Stella:

This is a very fast God's perspective roguelike shooter, the player will pilot the mech, explore the alien frontier, enjoy the "Crimsonland + Vampire Survivors (Vampire Survivors)" endless killing!

This is a Prologue experience for Acid Planet, a strategic Wave-Survival Auto-Shooter game. In the challenging first mission you will build your base, command your drones and battle to survive against hordes of monsters and gigantic Kaiju.

A top-down arena shooter in space where every decision you make can lead to victory...or crushing defeat! Make every shot, rocket thrust, and planet orbit count! Destroy the enemy motherships circling the system in deep space before their drones overwhelm you and exhaust your ship's resources.

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.

SURVIVE the swarm in this rogue-lite + survivors + asteroids mashup! Exterminate as many alien drones as you can. Upgrade your ship from the crafted deck of equipment and power-ups. You are the Last ship against the Endless... Will your choices be enough to overcome the thousands hunting you?

In Astrum Vanguard, a 2D horde-survival with bullet hell components, you pilot and upgrade your spaceship to defeat countless alien creatures. Survive the endless onslaught in the cosmic battlefield!

Danger Gazers is a post-apocalyptic roguelite top-down shooter where you pave your own path. The choices you make will decide your fate, it will either turn you into the new ruler or... the ashes to be windswept away.

Physics based roguelite bullet-hell-and-heaven horde-survivor action game. Research and upgrade spaceship. Traverse procedurally generated galaxies with ability to alter its conditions and effects.

Broadside Renegades combines auto-firing weapons with manual ship abilities in a rogue-like space pirate adventure. Choose your captain and upgrade your ship to steal the space kings booty. Warp ahead to stay alive, and mind your bearing.

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.

Repel extraterrestrial entities!

Bug Alliance is a top-down Action Roguelite where every level-up reshapes your build. Trigger Synergies, conquer 20-wave maps with boss finales, unlock a 13-chapter story on higher difficulties—then dive into Chaos Surge with endless bosses, curses, and risky rewards.

Crush, smash, and eat thousands of enemies showing humanity what the meaning of destruction is! Kaiju Catastrophe is an arcade game with roguelite mechanics. Mutate devastating weapons, unlock permanent evolutions, and wreak havoc with a variety of monsters to tear humanity apart!

Rustwing is a twin stick shooter roguelike, set in the distant future. Navigate from star to star, battle the scattered factions of humanity, discover strange anomalies, customize your weaponry, acquire powerful upgrades and become a legendary pilot!

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.

Addicting action-roguelite top-down shooter with a smooth circle fighting jagged enemies in a crisp neon look. Combine powerful and upgradable abilities to craft devastating builds while facing challenging and clever foes in procedurally generated mazes.

Deploy your turrets and defend against an ever-growing mechanical horde! Upgrade your turrets separately in unique ways, use unique character abilities, and create powerful synergies.

Plunder magic from the anonymously-owned public internet in this Roguelite Twin-Stick Shooter. Use the essence you steal to research new weapons or augment the ones you already have, to better battle against the network defenses and steal even more power.

Code of Shadows is a fast-paced real-time roguelite where you fight alongside powerful support drones. Pause on demand, evolve mid-fight, and push back relentless rift-spawned hordes across shifting dimensions. Adapt your build, master the chaos, and survive each run.

Defend Modulea! Dodge bullet hell, combine modules, and fight off waves of enemies with your custom-built space battleship in this roguelike action shooter!

A fast-paced survivors-like shooter with roguelite elements and round-based progression. Blast your way through demonic hordes in a futuristic post-apocalyptic world, fight bosses, upgrade your weapons and abilities, and survive the chaos of the NEOHELL

Can you survive the Empire's onslaught? Avoid the attacking enemies and upgrade your ship to last long enough to escape in this space survivorslike.

Heat Signature is a game from the developers of Gunpoint where you break into spaceships, make terrible mistakes, and think of clever ways out of them. You take a mission, fly to the target ship, sneak inside, and make clever use of your gadgets to distract, ambush and take out the crew.

Xenoadventure is a shooting light adventure game from a top-down perspective, where players will operate a novice warrior in the game. Based on one's own talents, continuously improve oneself from the system and survive

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.

Build your ship, escape the swarm, survive for as long as you can. When you are finally defeated, upgrade your technologies to survive longer next time. Escape from Zeta Aurigae is a sci-fi ship builder with rich meta progression.

"Bullet Buster Belle" is a Roguelite bullet-hell shooter game. Navigate bullet storms in cosmic ruins through daredevil grazing, build endless weapon/relic combos, and conquer formidable maiden guardians to claim their ultimate treasures!

Fight hordes of Covenant & Flood in this new game mixing Roguelite & Bullet Heaven for hours of mindless fun!

Control the ball with gravity and smash through endless hordes! Collect weapons and skills, power up to the max, and survive the onslaught!

Microbes and Machines is a roguelite action game where you control a little bubble robot that fights against the forces of evil.

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.

Cryptark is a 2D sci-fi shooter where you take on the role of a heavily armed privateer seeking to earn government contracts by boarding deadly alien space-hulks. It's up to you to strategize a plan of attack, pick an equipment loadout, and destroy the central core to be victorious.

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.