Top similar games like Planetary Siege:

Hexfall is a planet-scale tower defense game where over 100,000 enemies attack at once. Mine the crust, wire the power and arm a hex world against an armada that fills the sky long before it comes down.

Eversiege is a roguelike, tower defense in which you'll defend a castle in procedurally generated terrain. Establish a production, build defending buildings and survive waves of enemies coming from everywhere! After defeat, buy new buildings, unlock new leaders and prepare to fight again.

Do you like Tower Defense games with Strategy elements? Well, look no further! We've got exactly what you're looking for! Get ready to defend your settlement from enemies using a huge arsenal of towers!

A sci-fi low-poly tower defense game. Design your defense against waves of aliens using a wide arsenal of different towers.

Build and lead a colony on the surface of an endless Wall. Manage resources and your people, develop new technologies, defend against relentless zyrex attacks, and send robo-spiders on risky expeditions. Keep the colony from collapsing – in Wall World, it's easy to fall.

Classic Tower Defense meets space exploration. Build turrets on mining platforms, harvest enemies to build more defenses, and mine Dark Energy to travel the stars. As a sentient AI, you must upgrade your tech, scan planets, and find a new home for humanity before Earth fades away.

Assume control of an evil intergalactic megacorporation in this sci-fi tower defense. Build a mining infrastructure on alien moons and exoplanets, exploit their precious resources, and defend your operation against defiant natives.

Loop Defense is a single-player sci-fi tower defense game. Build enemy routes with base walls, assemble a modular defense, manage limited loadouts, energy, and research, face armored, flying, carrier, and wall-breaker units across a star map, or challenge Endless Mode.

You are on the run. Build stations in hostile systems, gather what resources you can, and jump away before you are overwhelmed. Your ships are slowly failing, but the Swarm is relentless, hungry, and on your heels. Can you survive long enough to secure a future for humanity?

Command massive space battles where thousands of ships clash in real time. Build your fleet, choose a doctrine, reinforce the battlefront, unleash commander abilities, and adapt as unexpected events turn the tide of war in this mashup of strategy and auto-battler.

This is a sci-fi strategy game featuring a Defense Mode focused on tower defense and an Attack Mode focused on combat. The game includes over 30 different buildings and units, all of which can be upgraded through entry editing to enhance their performance and firepower.

A planetary tower defense where enemies attack across land, air, and space. Build layered defenses, manage resources, and survive an escalating alien invasion.

It's pirates against British sailors (or each other) in this real-time strategy city-building game. Gather resources, build cities, drink rum, fight enemies, explore the sea, and discover new islands.

Create a thriving space station in a lost sector. Face thrilling challenges head-on, from pirate raids to asteroid impacts, as you lead your company to new heights.

Rise Under the Warstorm is a strategy game focused on automation, production, and base defense. Gather resources, build automated production lines, optimize your economy, train armies, and protect your settlement against enemy waves.

Build. Defend. Survive. Expand. A sci-fi base-building game on a hostile alien world. Gather resources, build a sprawling high-tech colony, and defend against relentless alien threats—then unlock new planets, new challenges, and the secrets of humanity’s last frontier.

On a forgotten world, confront a malevolent machine intelligence. Extract minerals, build factories, power up the railguns, and arm the missile batteries. Defend the Fortress Omega against the alloyed nightmare.

A strategic tower defense where you command a flock of chickens to gather resources, fortify defenses, and survive relentless predator attacks. Balance growth and survival as you protect the next generation through treacherous nights against tactical predators.

As CEO, build your corporate empire! Design space-efficient factories in a grid-based puzzle system. Fund cutting-edge research to optimise production, master complex supply chains, and dominate a living interstellar economy.

Flow Factory is a physics-based factory automation game. Tinker with complex production lines, make them faster and more efficient. Deal with freely floating pieces and defy gravity. Build, research, optimize. Relax and enjoy everything running smoothly.

Grid Miner is a real-time strategy puzzle game where you mine asteroids to gather resources and expand your space station. Unlock new tools and utilities as you progress through levels. Maintain your quotas and learn more about your employer and coworkers at Hypergo Industries.

A factory-building game. Survive a harsh climate, strip mine an infinite world, and build a sprawling factory, then trade or go to war with Colonists, Governments, Pirates, Rebels, and more!

The Final Bastion is a Multiplayer PvP & PvE Tower-defense with a classic Medieval-Fantasy theme. Compete against players in head to head online in a PvP, sending waves against the enemy and growing your economy. Play side by side with your friends in PvE and see who survives the longest.

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!

Build your spaceship, Gargantua. Establish industries, shape the free market, trade between planets, and defend your wealth. A single mistake can collapse supply chains and trigger interstellar economic crises. Remember, war is money.

Little Kingdom RTS is an indie real-time strategy game set in a medieval fantasy world. Gather resources, build settlements, raise walls, and grow your small kingdom. Command an army of knights, archers, and mages to fight off rival kingdoms, orcs, and undead.

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.

A real-time war of air defence and industry. Build the economy, bury it, and layer SAMs over what you cannot hide. Read a fading intel picture of the enemy base and aim every missile yourself. Break their will to fight before they break yours.

Build & defend a small remote mining base on Taichin XI from the alien hordes. Deploy defenses, upgrade your turrets and get ready for the nightfall. The Unearthened is a classic Idle Tower Defense game where you build towers and prepare for the invasion.

VALTERION: THE LOST EARTH is a sci-fi colony-building strategy game. Lead 50 survivors on Elyra, build a thriving colony, develop its economy and research, return to the stars, and search for the lost path back to Earth.

Outpost Surge is a society survival game on Mars, where players balance resource management, city growth, and settler health to turn a barren landscape into a thriving, vibrant city.

Debatto is up to 8 players multiplayer resource management game. Manage vehicles and show Your multitasking skills. Be the fastest builder and compete on worldwide leaderboards.

Defend your base by placing towers strategically, forming interconnected systems that depend on one another. Adapt your strategy to different environments and enemy waves, exploiting their weaknesses. In System Status: SuperCritical, resources are scarce and critical failure is always an option.

A strategy game with a new kind of enemy, Calyx puts you in charge of a space mining outpost, locked in battle against powerful plant-aliens. Build your base, gather resources, assemble your forces, and take on the Calyx. With only an out-of-date AI for company, can you survive?

The unstoppable fluid enemy has returned and destroyed every world in its path! Defend against Creeper as it floods across the 3D terrain in this real time strategy game where the enemy is a fluid.

An alternate reality sci-fi survival RTS. Command, defend and dominate in 2044 against endless waves of Soviet super soldiers. Two factions, each with their own distinct technology and tactics.