Top similar games like Ultra Mega Planet Battles:

B.O.T.S. and the Robofriends is a sci-fi top-down shooter rouge-lite with multiple games modes. Play alone or with friends in 4-player co-op choosing from 4 unique robot characters with different attributes and attacks. Defend your home, rescue the Robofriends, and find MOTHER!

AREA WARS™ is a fast-paced 2D omnidirectional shooter where you battle enemies from every direction in a constantly changing enclosed area. Defeated enemies trigger chain explosions that engulf nearby foes and boost your score multiplier. Built for short, repeatable runs with score-focused gameplay.

Frantic 4-player laser ricocheting top-down shooter. Keep it casual and enjoy the chaos, or master the surprisingly deep mechanics to obliterate your enemies. Duke it out locally in free-for-all or 2v2.

The space dungeon where every move drains energy. Scrap aliens to recharge, loot to survive, and crawl station to station before it's lights out.

Alpha Force Zero is an intense top-down bullet-hell adventure that requires skill and planning. Utilize multiple weapon systems including an Auto-Turret with adjustable firing modes and unlock upgrades that you can equip in your ship to give you the upper hand. Dodge, fight, survive!

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. *

Enter the cockpit of your spaceship and prevent the destruction of our homeland! You and your friends have to dodge various attacks and fight many enemies. But your Twitch chat can support you in your defense and your subscribers can even accompany you as wingmen!

Grab your friends and build and fly your own customisable spaceship. With local and online co-op customise your spacecraft with a wide variety of components, you must work together to figure out the best way to survive your journey!

KosmoSquad is a twin-stick arena shooter where you survive as long as you can against an ever-increasing hoard of enemies. Fight alone or with up to three friends and collect star multipliers to maximize your high score. Use your score points to purchase upgrades for your ship and try again!

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.

Brace yourself for explosive space battles in GalaxIverse II! This intense multi-directional shooter puts you in the pilot's seat against alien fleets and colossal capital ships.

SCHAR: Blue Shield Alliance is a cooperative twin-stick shooter that features a variety of complementing ship classes to choose from. Upgrade your ships, defeat hundreds of enemies, save the galaxy all with some friends from the comfort of your couch.

Take control of a combat mech in an old-school sci-fi shooter. Upgrade your machine and unlock powerful support drones. Face alien creatures and hostile machines alone or with up to 3 friends in local co-op.

Consume the civilization of the fools who unleashed you upon the universe. Become the Empire Ender.

Friday Night Bullet Arena is a top-down multiplayer shoot-a-thon with a twist: each player only gets one bullet! You can catch your own bullet to fire again, but catching other bullets is... not recommended.

A vertical-scrolling shoot-em-up. Each run takes you through 7 of 14 worlds, every stage ends with a mini boss with its own signature move, and a multi-part final boss waits at the end. Local co-op, Remote Play Together, Daily Challenge and Boss Rush.

Escape corruption and deliver truth to the people in the only way you know how. as a space fighter pilot! You steal a ship and flee, it falls to you to duke it out in space and deliver truth to the people. Restore peace. Restore justice. Save humanity and Escape The Kreegan!

Experience the explosive science fiction arcade-shooter that resurrects a much revered franchise in an epic single player and co-op multiplayer campaign.

Retro pixel-art top-down space shooter. Battle waves of alien invaders across world landmarks, upgrade your ship, collect power-ups, tackle events & missions, defeat epic bosses, and chase high scores.

Blast aliens to pieces and start a rebellion in this fast paced pixel art top down shooter where sprinting kills.

Shoot from affar or get nibble away up-close and personal in a boss-rush, bullet-dodging revival of the 1982 Atari classic title, Yars' Revenge. Take on 60 unique enemy encounters alone or with a friend in local co-op.

A top down, twin stick shooter inspired by classic retro arcade games with loads of enemies, fast paced bullet hell combat, big boss battles and tons of bullets.

Pilot through relentless waves of hostile forces in this fast-paced space-themed, bullet hell, survival shooter. Build your own UFO in the Ship Creator, Survive through a 100-wave campaign, or test your limits in Endless Mode. How long can you survive?

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.

It's time for a change in perspective! Explore an adventure full of tricky action and puzzles in this third-person and top-down shooter hybrid!

Fraypace is a local multiplayer top-down space arena shooter for up to 8 players. Choose your fighter, select your weapon, and enjoy the fast-paced and physics-based action with friends or AIs in fully destructible maps.

Survive increasingly difficult rounds in a floating arena. Use weapons and powerful abilities to knock enemies into the void before they launch you off the edge, build your loadout during each run, and beat your highest score.

Lead a squadron against the Drone invasion in a top-down space shooter with RPG depth. Take contracts across three galaxies, outfit and upgrade your ship, recruit wingmen, and push the story through to the Nexus.

Break twelve worlds, steal their cores, and fly them as your fleet. A single-run top-down arcade shooter: thirteen stolen fighters, twelve bosses with real weak points, a run that never pauses, and a leaderboard for every world.

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.

Cosmic Tank is a modern take on the classic game Asteroids. Mine your way to riches! Fight off hostile threats! Upgrade your ship and rent a few helpful drones! Survive epic boss fights!

Lonefield Evacuation Survivor is a... survivor in which you play as a ship facing an alien incursion. Destroy your enemies, collect bolts and upgrade your ship to survive long enough and escape. Play alone or with up to 3 friends in local multiplayer or with Remote Play Together for online gaming.

The sequel to Toaplan’s shoot ‘em up masterpiece Truxton is a thrilling insane space action with an unforgiving difficulty level. Enjoy the visually stunning pixel graphics and vibrant music as you dodge the high-speed bullet rain and take on tough bosses.

"Raiden" unites! Get ready to blast into a thrilling new dimension like never before!

A retro-inspired, action packed, twin-stick shooter full of bullets, blood and explosions. Collect and manage your guns to exterminate jungle zombies, swarming bugs, heavy robots, slimy monsters and even space ghosts.