Top similar games like Swarming Planet:

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.

Totally Defenceless is a wave-based tower defence game. You will need to protect your energy cores from the invading alien bugs by strategically constructing a maze of towers to alter their path to your advantage.

Build your towers, plan your efforts, watch out for changing paths and strike back against the alien invaders in this challenging tower defense game!

Embark on an adventure with Loot Express Delivery Service, a 2D pixel art game. As the commander, your goal is to retrieve valuable items from a distant planet. Utilize your skills and strategy to complete missions and guide your company to prosperity.

Defend the energy cores from ever increasing enemy waves by destroying their spawn gates. Build tower mazes on Hex grid. Adapt them to dynamic changes in the terrain. Face quirky bosses. Design your own levels and share them on the Steam Workshop.

Taur is an action-strategy sci-fi game. Control the Prime Cannon and unlock all of its powerful weapons and abilities. Build turrets, droids, aircraft and more as you fight to protect the homeworld of the Tauron droids against a relentless invasion. Will your Taur stand against the Imperion warmachine?

Super Sanctum TD is a retro-styled Tower Defense game that focuses on strategy, customization and replayability. Build advanced mazes and construct powerful towers to prevent alien hordes from reaching the Core!

Grey Galactic is a real time strategy game in space where you build up your planets and ships to conquer your enemies. Develop your empire and fleet of spaceships to destroy your enemies and take over the galaxy! Do you have what it takes to become the best Fleet Captain the UFMC has ever seen?

Starfall Defenders is a classic tower defense game that features unique towers and enemies. It also has an in-game shop system that allows players to purchase better towers, upgrade existing ones, and buy special items like the Atom Bomb, Splash Bomb, and Air Supply.

Galactic Garrison is a sci-fi, turn-based tower defense game where you defend your base from relentless alien waves on Mars. Deploy soldiers, build barricades, and upgrade defenses to withstand attacks. Earn powerful reward cards to gain strategic advantages and outmaneuver your enemies.

Build a small mining colony in deep space and defend it from alien invaders as you extract precious minerals from asteroids in Astro Mining.

A strategic tower-defense where you control powerfull drones. Unlock new tower and use specific technologies to defend your base on Thukothea!

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

Build your defense base to repel alien invaders. Atahion is a strategy and tactical defense game in which you have to extract resources, build defense towers and use bonuses to complete the mission.

You are in command of the human fleet, searching for asteroids to mine, extract resources and build bases and more ships to defeat aliens invaders. This simple and short action RTS has a full and exciting campaign, and a skirmish mode that allows you to play a different mission on every match.

A strategic and action-packed base survival game where you mine crystals, build units, and defend your base against waves of UFOs. Defeat enemies, gather resources, and unlock new planets to expand your defenses. Are you ready to conquer the galaxy?

You are isolated on a small meteor and need to build a fire to escape before being destroyed by aliens. Use your limited space to create machines and obtain more and more resources. Enjoy this mix of puzzles, tower defense and incremental gameplay.

Dicey Towers is a unique tower defense hybrid that includes a variety of unique enemies, towers, and bosses. Upgrade, combine and, manage your towers to defeat countless waves of enemies as they attempt to breach your kingdom.

Build defenses to protect your mining sites from the hostile native alien species. Explore the planet and discover the true reasons you've been sent here for. A true old school pixel-art experience.

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.

Eternal Space is a city builder and space exploration/combat game. Explore the Eternal Space, and manage your city while you fight pirates, or maybe even become a pirate! Keep your citizens happy, and collect taxes from them each year for a little bonus!

The Last Drop is a pixel art top-down shooter where you control the last water droplet on Earth. Battle waves of enemies with unique weapons, customize the map, and compete on the online leaderboard.

The ultimate mash-up of Real-time Strategy and Tower Defense!

ViSP – Virtual Space Port is a creative building game for VR. Construct your own space port out of blocks and defend it against relentless enemies to fortify your space colony!

The machines are coming! Build a maze and place powerful towers to defend your portal against an army of robots!

A classic tower defense game set in space! Build and upgrade towers, defend your portal from waves of alien invaders, and outsmart evolving threats across handcrafted and procedural maps.

Customize your Gun Bots to fight through 7 unique worlds with different weather conditions that become more challenging as you progress.

Armoured Onslaught is a fast paced Top-Down Shooter and Tower Defence hybrid. You will need to make use of both strategy and skill as you fight your way through near endless hordes of deadly foes.

The creeper is flowing through canyons to your base while you rush to build a space station in 3D by sending packets to your building foundations and pushing the fluid back with your weapons, eventually capturing the sources of the enemy or being drowned by it.

Employ lethal turrets, traps, and gadgets to defend against an onslaught of evolving creeps! Step into a twisted, hyper 3D, mind bending realm. Upgrade and adapt your defenses. Become a master maze crafter. Collect bizarre artifacts. Rush creeps for lucrative rewards, and succumb to greed!

Players measure stamina with a never-ending stream of green creatures within the borders of a special military mission.

Blast off through space, dodge asteroids, and beat bosses!

MILLIONS OF ALIENS WILL DIE!Radiant Defense is a tower defense game set in a vibrant universe invaded by countless alien hordes.Build your space fortress any way you wish, set up wide variety of weapons and traps and let the invasions begin!

Step into the shoes of the last standing drop of water, tasked with defending against the relentless assault of evil sponges determined to absorb every remaining drop. Although you stand alone, you possess all the water knowledge needed to create impressive structures and fend off your enemies.

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?

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.