Top similar games like Omnicore: Freiza's Retribution:

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.

Become Romby, a tiny crystal lost in space! Survive and defend the crystal against dark waves by upgrading crazy weapons, planting strange flowers, and using tarot cards. Explore constellations, defeat bosses, and unlock over 100 unique skills.

Desperate Place is a strategic tower defense game where you play as a crew member who wakes up early on a damaged colonization starship. Stranded on an unknown planet, you must gather resources, repair the ship, and defend against alien monsters to survive and escape.

Heroes Rally is a casual strategy tower defense game. Build towers with different characteristics and command heroes to repel all the enemies. Go and develop a your unique and powerful strategy!

Immerse yourself in this Vertical Shoot 'Em Up 80's Style Arcade, with unique Graphics & Sound. The game includes Ships, Missiles, and Special Weapons upgrades. Shoot enless waves of Viruses, Amoebas, Spores and Bosses. Protect the Containment Wall, do not let the Exuoa virus through.

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.

Good old fashioned 2D arcade fun with tons of upgrades and fast paced action where taking risks is rewarded with a higher score. Defend humanity's last source of energy wrench in one hand, laser gun in the other

Build your towers according to the enmey you are facing in the wave. Upgrade your turrets to increase range, damage or rewards. Each enemy wave will be random and increases in speed and damage resistance. How far can you go!

A tactical defense game where you build the battlefield itself. Lure enemies through your maze using traps, towers, and godly powers.

Take command of your ship, step into the arena, dominate your opponents, and put your reflexes and skills to the test!

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. *

Dodge waves of bullets in cover shooter + shmup-inspired combat, as you strike back with powerful attacks of your own! Use clever cover spots to gain an advantage over your enemies, find treasures to make yourself stronger, and avoid taking damage to raise your score!

C6: Frontlines is a bullet hell co-op roguelike where only YOU (and your friends) can bring the Azapall galaxy to peace. Wield 30+ weapons and gadgets of mass destruction to even the playing field, wave after wave, against a seemingly endless onslaught of evil!

Unknown planets, whole new universe, with hundreds of ships to fight and explore, special abilities and ships craft. Rome 2077: Space Wars is a top-down shooter with ship craft, storyline, RPG element, survival endless mode and much more!

You’re being Bounty-Hunted! Run, Build your ship piece-by-piece and make it work with the parts you find, Destroy outposts and waves of fleets, and Pick your battles carefully to overcome your hunters in this Fast-Paced Top-Down Action Roguelite Shooter.

Fight gigantic hordes of goblins with a supercharged vehicle and arsenal of crazy weapons, in a chaotic physics-based battle for survival

Spectral Realm is a top-down tower defense Rogue game, where players need to play the role of an astronaut who has just landed on a different planet to block a constant stream of attacking native creatures and continuously strengthen themselves with the gems contained within their bodies.

Swarm Survivors: Endless Siege is a light roguelike bullet-hell idle shooter. You play as the last survivor of the Swarm, fighting to stay alive under the endless siege of alien fleets. Build overwhelming power and face wave after wave of relentless challenges.

Slice them, burn them, skewer them, and launch them - no matter how you get it done, orcs must die in this fantasy action-strategy game from Robot Entertainment.

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.

Save Our Solar System brings a fresh look on the tower defense genre. Shape the world around you with a lovable playable character. Harvest metal to upgrade towers. Collect rocket parts to advance to further planets. Fend off endless waves of asteroids.

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.

Be the Gun & the Architect. Arcade-Tower defense hybrid with controller-first design for a snappy tower building and twin-stick shooting. Every kill feeds the machine. Adapt to roguelike chaos with unique items and synergies. Can you build the ultimate defense & survive the Derp?

WarShape is a "Top Down Shooter" where you face growing hordes of enemies. As you progress, the weapons and defenses of everyone in the arena evolve, starting from primitive equipment to technological weapons. Build, find weapons, recruit allies and buy upgrades to survive the attacks.

In a fantastic and unique land, dark creatures seek to destroy the peace of the world and rule the earth. Help the Mages to defend the world against them building traps in their path and using magic in a colorful and happy environment

Spells and Fellas is an action-packed survival game with magic-based combat. Bring your enemies to their knees and receive more powerful spells and equipment as loot. Recruit allies to fight alongside you to increase your chances of surviving all 100 waves of enemies.

Millions of players worldwide have flown, built, and fought their way through Captain Forever. CF Trilogy brings Captains Forever, Successor, and Impostor to Steam with a beautiful new renderer, new modules, and a reimagined world written by acclaimed novelist Cassandra Khaw.

Your castle is under attack! Defend your walls against enemies and epic bosses. Upgrade your defenses with unique weapons, strategic skills, and special upgrades! Become an unbeatable defender and master every battle.

Protect your base against an onslaught of monsters using your mighty saw!

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.

Fast top-down space shooter with varied missions, relentless enemies, powerful ship upgrades, and most importantly, fire.

Alpha One is a top-down action, 4X-lite strategy game. Each action level is a turn in a strategic conflict as you race to collect resources, acquire upgrades, expand territory and build defenses. All to find a way home!

Defend Spacebase 19 from the asteroids swarming down on the station! Shoot down waves of stones and equip different powerful weapons. How many waves can you last? A simple nostalgic retro arcade turret defense shooter.

Gear up and get going! Defend your outposts from waves of alien enemies with your mech. Build and upgrade your base, protecting the extraction of the mysterious planetary system’s rich resources!