Top similar games like Planet Boom:

On an alien world, you must defend yourself in this unique base-building tower-defense game. Build a base by placing blocks, turrets and traps in order to survive the hoards of aliens.

Co-op twin-stick base building survival game.

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.

Tower Tactics Arena is a fast-paced action roguelite set in the Tower Tactics: Liberation universe. Battle relentless enemy waves in a closed combat arena, level up your towers strategically, and gather powerful trinkets and potions! Will you claim victory in the arena?

Build a battleship and fight through unforgiving space to save your people. Make strategic decisions, guide your people, meet allies and foes, and battle for your right for a home. The tale of a lone spaceship on a centuries-long mission from Voidship: The Long Journey greatly enhanced and updated!

Roguelike bullet hell shooter, where you fend off waves of attacking monsters in a constantly transforming arena. You are rewarded with upgrades to your vulnerable spaceship if you survive long enough.

Brutal twin stick shooter with fun and clever enemies. Also has roguelite and Sci-Fi stuff.

A Roguelike Tower Defense in space with missions to conquer. Can you hold against the spreading alien bosses? Build and upgrade towers against the corruption. Choose your technologies and warpspeed your way to victory.

Customize your Ships, Upgrade your fleet, and Command your way to victory in this ruthless rogue-lite tower defense/real time strategy hybrid. Take on an enemy that learns from your moves and adjusts its own path. Do you have what it takes to persevere?

Pilot an agile star fighter to tear down alien megastructures under fire, then pull off a high-stakes heist from within before everything explodes. When you die time rewinds, sending you back to Moonbase Alpha—your hub for reinvention. Spend your bounty on explosive upgrades, ready for the next run.

Pick cards, equip stones, chain color synergies — and survive endless meteor waves. A 3D sci-fi tower defense roguelite where every run builds different and hits harder.

Beautiful pixel art space roguelite autobattler where your ship fights for you. Upgrade your ship, collect loot, stack wild synergies, and become ridiculously overpowered.

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.

36 Nights is a tower defense game with roguelike and bullet heaven elements. Buy turrets and upgrade your survivor to defend against waves of zombies. You'll need careful strategy and a little luck if you want to survive 36 nights...

Turn your armada into a rotating fortress, striking from every angle. A roguelite tower defense where spatial reads decide 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.

A rogue-like sci-fi Tower Defense strategy game with infinite replayability!

Fast-paced roguelike where you mine and explore procedurally-generated asteroids. Collect unique stackable upgrades to aid you in your quest for riches! (and freedom...)

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!

A broke bounty hunter. A sarcastic robot. 1,000,000 credit debt. Star Scrap is a chaotic twin stick space roguelite. Blast through increasingly difficult waves of enemies to pay it off.

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

Relaxing mining experience that merges combat elements and 1-bit pixel art aesthetics. Collect minerals from procedurally generated asteroids, improve your ship and survive The Anomaly, an unknown entity threatening The Galaxy. Can a simple miner stop The Anomaly and save everyone?

An action rogue-like about garden plants fighting back against the hungry pests that threaten their home. Spend the day blasting through hedges to find loot, but take care to make it back before dark! Gather synergistic items, confront formidable bosses, and play as several unique characters!

Bakorila is an action roguelike focused on dash-based combos. Climb destructible towers, defeat enemies with lethal dashes while performing wall jumps, and use your weapon to survive increasingly dangerous threats. Build your loadout, defeat bosses, and help Bakko return to his homeland.

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!

Boom Buddies is a fixed-position bullet hell survival game where animal heroes face endless enemy waves, upgrade weapons through card choices, unlock new characters, and compete on global leaderboards.

Tower defense reimagined! Dead Ground is a procedurally generated tower defense game with rogue-like elements. Each playthrough will offer randomly generated guns, skills and augments. You'll have to travel, collect scrap, water, manage your inventory and upgrade your base to survive!

Mine, defend, and profit across planets. Expand your operation, survive enemy waves, and discover dangerous hidden worlds in this minimalist sci-fi strategy shooter.

Skycliffs is an action shooter roguelike dungeon crawler with fast-paced top-down platforming. Jump and dash across sky islands, fight loads of monsters, and get upgrades to survive the many dangers of your journey. Will you be strong enough to reach and defeat the keeper of this floating world?

Defend your Starbase in a vibrant roguelite shooter. Upgrade your weapons mid-run, unlock permanent rewards, and survive the endless onslaught.

SinSiege is a action rogue-like/tower defense hybrid set in Hell, where humanity's embassies is under siege. Play as legendary heroes, build divine defenses, and face off against waves of demons corrupted by the Seven Sins in a battle to protect mankind’s final haven in hell.

About：The solar system was invaded by aliens of unknown origin. The earth has fallen. As the commander of the surviving space fleet, return to the solar system from outer space and save the earth.

Defy the laws of space and master every trajectory in Orbital Survivor, a 2D survivor-like game where you optimise your movements and shots thanks to gravity. Play as smuggler Cassidy and unleash your arsenal in a ruthless retro-synthwave universe.

Summon hordes of minions to defend your realm against invading heroes in this fast-paced fantasy strategy game. Unlock permanent upgrades, new levels and more advanced minions to survive the ever-growing threat.

Descend into a dangerous, procedurally generated sci-fi underworld. Explore, gather resources, uncover powerful wargear and upgrades, rally your droids, build and defend your base, and battle a mysterious new species on the verge of breaching the surface, either alone or in co-op.