Top similar games like Ostallian Core:

Arcadium is a roguelite shooter set in a dynamically generated universe. Journey across space, harvest planetary resources, and craft powerful builds to eradicate relentless waves of aliens. Each playthrough unveils a new and uncharted universe, ensuring endless challenges and discoveries.

Prepare for an interstellar showdown like no other in a gripping roguelike top-down twin-stick shooter set in the vast depths of space. Pilot your advanced starship, engaging in relentless battles against hordes of alien adversaries. Destroy, Collect, Upgrade, Die, Unlock, Repeat.

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.

Brutal (one hit kill) twin stick shooter with hilariously fun and clever enemies. Also has roguelite and Sci-Fi stuff.

Enter the Blacksea Odyssey, a violent top-down rogue-lite space shoot ‘em up RPG brimming with colossal creatures and runic technologies. Explore dangerous, interstellar spacescapes as you hunt enormous space-behemoths with a harpoon and rune-infused spears.

Dodge the enemies shot and kill them with different weapons. Move, Dodge and Kill is a rogue-lite dungeon crawler in a neon environment.

You are under attack by UFOs in space. Blast incoming UFOs to earn XP and gold. Choose 3 of the 5 weapon and feature cards that arrive at the end of the first wave. Improve your weapons and abilities with the gold you earn. Move through the waves and try to reach the last wave and boss.

A cozy time survival roguelite in space. You steer the shippy while the shooting happens automatically. Meet cute NPCs, solve small quests, and fight quirky enemies with satisfying weapons. A shorter experience for people who don't have much time but love playing (and finishing) games.

Join legendary RPG heroes in 'Legacy of Evil,' a classic arcade Shoot 'em Up. Battle the sinister Dravlo Stradinic and his dark forces. Upgrade your heroes and face terrifying bosses. Can you defeat the vampire and save Stygia?

Roguelike top-down shooter with a 70's Sci-Fi theme. Fast paced. Play as a parasitic worm, control the brains of your enemies.

Stop the bogus creeps in this hardcore action roguelite! Equip rad perk based armor in five slots, wear and unlock new gnarly costumes with active and passive abilities, use tubular randomized guns, unlock tons of new ammo types and upgrade your awesome mini-mart!

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

Gospel of Abaddon is a 2D mix of RPG, Shooter and Roguelike. During WW2, an American pastor deserts the army and after using amphetamine, he sees God telling him to destroy the entire sinful world...

Prepare for an interstellar showdown like no other in a gripping roguelike top-down twin-stick shooter set in the vast depths of space. Pilot your advanced starship, engaging in relentless battles against hordes of alien adversaries. Destroy, Collect, Upgrade, Die, Unlock, Repeat.

ZEROCRON is a straightforward, classical arcade Twin-Stick Shoot-Em-Up with a strong Commodore-Amiga-era feel. Blast asteroids and enemies to burning pixeldust!

Pilot your sub through waves of angry sea-life and punishing bosses in this aquatic twin-stick shooter.

A semi-procedural shoot-'em-up that will test your skills. Level up your ship, unlock amazing weapons, and defeat 5 formidable bosses. Challenge the infinite by facing real-time waves of enemies after completing all missions. Become the intergalactic hero now!

Splitfire is the first twin-stick shooter where each thumbstick controls it's own weapon! How does it work? Simply push the left thumbstick to move & shoot! Then, push the right thumbstick to fire another weapon in a separate direction! That's all it takes to Splitfire!

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.

Start off as a weak ship with a simple attack and fight through waves of enemies, earning currency in order to purchase upgrades for your ship. The never ending waves of enemies grow in number, power, and variety as you progress. Purchase upgrades to keep pace with them.

Split Drive is a roguelite arena shooter where you have to find your way home through a hostile galaxy, numerous locations and a variety of bosses, all generated procedurally.

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.

Explore the stars in this 2D top-down sci-fi game, where you can engage in dogfights with spaceships or disembark to challenge your enemies on foot. Complete contracts, unlock stronger ships, and discover ancient mysteries hidden in forgotten galaxies.

Dodge, shoot, survive! Polygon pursuit is an arcade-style twin stick shooter where you are pursued by multiple enemies constantly. You play as a lone circle confined in a polygonal world fighting to survive against waves of unique enemies. This is not an easy game.

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.

AGIS - A Game In Space is a top-down twin-stick-shooter.

Destroy friends, strangers, or bots in this online multiplayer arena shooter. Collect powerups, combine weapons, build your defenses and obliterate the opposition. Hundreds of weapon combinations and multiple game modes.

"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?

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

Bat Blitz is a fast paced, top down shooter, roguelike where you have to kill bats to stay alive as long as possible.

Build a stronger ship with each play session as you earn resources needed to upgrade your ship and apply stronger weapons. Customize your ship to your play style and tackle greater and stronger enemies as the levels continue in this endless roguelite.

A game about exploring space in search of hospitable planets for colonization. Casual gameplay and short rounds make it a great option for killing a few minutes.

Back with new weapons, new enemies, and with more circuits to break than ever! Destroy millions of robots in this free-to-play shooter with up to 6 players.

Krampus is Coming! Grab your Shotgun, finish your hot punch and don't forget your mission: Save the Christmas! Big Trouble in Little Chimney is highly-addictive and fast paced arena bullet-hell shooter.

A frantic arena shooter for up to 6 players. Play solo, or battle your pals online. Grab a weapon, don your comically oversized hat & an absurdly mismatched outfit, and KILL YOUR FRIENDS!