Top similar games like Planetary Defense Force:

Get Off My Space! is a tower defense game where you rely on skillful tower placement and resource management to beat upcoming dangers of the galaxy. Combining strategy and micro-managing fire groups, you will overcome the hardest level objectives.

Citadelic is a base building and defending strategy game with roguelite elements. Survive against waves of constantly evolving enemies while expanding your base and managing resources.

Tanks Etc. is a modern reimagining of co-op overhead arcade classics; it offers classic gameplay while adding in depths of strategy to keep players reinventing strategies for waging war with their friends.

Escape from the enemies and build a fortress to face them, you can play alone or in online games of up to 4 players.

In this Procedural City-Building and Survival game, you must manage your resources, expand your village, assemble an army and destroy the source of evil, which changed the entire eco system of a land that was once prosperous and peaceful.

Paper Protocol is a Tower Defense game with elements of Real Time Strategy. Command a versatile mech and a squad of high tech turrets to defend the Paper Co. building from angry trees! Upgrade both yourself and your turrets to defend against the trees and their unique abilities.

In Night Keep you build your own empire and defend it against waves of enemies.

Stand on guard of global safety, wage wars no one hears about, or start new ones. Once you have been a soldier. Choose between justice and money. Now you are a… Professional Soldier.

They're Coming! Get ready to defend your lovely Flower from invading insect! Prepare your Bug Spray, Call your Holo-Pet, Fortify base and don't forget your mission: Find the Watering-Can!

Co-op twin-stick base building survival game.

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.

Defend Tiny Island from waves of monsters that come every night! Collect various skill and building cards to grow stronger. Complete your own skill tree and use building cards to place structures that attack your enemies.

As the kingdom's most promising pioneer, embark on a legendary journey to tame the frontier! Build thriving towns across various landscapes, fending off waves of diverse enemies until you establish a firm foothold and have explored everything the eye can see!

Sky Fleet is an online co-op action RTS. Work together to build a base and defend it from attacking drones. Mine resources to upgrade your ship and destroy the drone's base.

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.

A minimalist game about fighting for freedom and independence in the United States of America!

Let's go on an adventure on our little island. We capture enemy islands and increase our island. We place different types of troops on the island and fight with a stronger enemy.

Diplomacy is Not an Option is a strategy game set in a medieval fantasy world. Build your town and defenses, raise huge armies and fight against massive hordes of enemies. How long can you survive?

Kaiju Commander is a strategy game where your main task is to dominate the whole world. To achieve this goal, you will be managing an evil corporation that breeds powerful monsters known as Kaiju. Develop your underwater base, gather resources, and dominate the world!

Dive into the Smash Cup universe! This genre-blending top-down shooter allows you to craft your own base, combining MOBA, tower defense and deck-building elements for a unique battle experience!

A defense RTS where you can move turrets at will. Extract resources, upgrade technology, and defend against enemy swarms in a gripping space campaign. Hold the line, set up your turrets, and brace for screen-filling hordes!

Journey to Moonray is a hypnotic, top-down twin-stick shooter featuring silky smooth visual FX and intense combat. Journey to Moonray offers beautiful shaders built on fluid physics to create a unique and surreal visual experience combined with classic, top-down twinstick shmup action

Defend your base from hordes of sheep. Fight as a hero with powerful abilities or shapeshift into a flying eyeball god to traverse the battlefield and command troops. Build your defenses and economy while maximizing auto-battler inspired synergies that unlock power-ups for your hero and defenses.

Mecharise is a strategy and tower defense game that combines elements of base building, resource management, and wave-based combat against hostile aliens. Pilot a mecha as you colonize new worlds and defend your base against enemy attacks.

A minimalist game about building and defending your little kingdom.

Defend entire planets against hostile invaders in this full 3D tower defense game. Manage resources and space while constructing weapons, defenses, and structures to withstand the destructive onslaught across multiple planets.

Build, manage, fight in a post apocalyptic RTS game

Acid Planet is a caustic blend of horde-survival, tower-defense and strategy. Build, fight and evolve to survive against rampaging swarms of monsters and fearsome Kaiju.

Colonize rich planets with vegetation or deserted moons. Build a functional and prosperous colony. Take care of your colonists. Experience adventures on distant worlds or build a colony on planets in our solar system.

Defend your base on Mars from invaders in Residuum. A thrilling mix of tower defense and shooter gameplay, upgrade weapons and choose your crew for a unique experience each time. Play with a friend for even more excitement!

A couch co-op tower defense game, in which the towers you build can hurt you and your friends just as much as they can hurt your enemies. Build towers, aim them towards your foes and collect the crystals that drop in order to build more turrets and survive the endless hordes of enemies!

Protect your cities against waves of enemies. Manage your resources and plan accordingly to develop your city and armies to survive!

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.

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?

Simplified real time strategy game where you lead an island expedition. The player can take direct control of a hero on the battlefield and fight enemies head on! Choose between various heroes with unique abilities and playstyles. Conquer the mysterious islands for the kingdom!