Top similar games like The Echoes of Mars:

A tower defense strategy science fiction game, in the future era, when aliens invade the solar system, players need to build various turrets to resist alien attacks and guard the Milky Way and solar system.

Project Myriad 2 is a tower defense strategy game. Build towers on a grid of hexagons floating in space. 35 levels with unique tiles and mechanics each providing a unique challenge. 3 difficulty levels including extreme mode which has never ending waves of enemies. Strive for your new high score!

A 3d tower defense game set in space. Protect the last resource outposts from the ongoing Alien attacks! Can you hold out in these ever increasing difficult waves of enemies and protect the last of your resources and Energy?

Orcs coming TD is a classic tower defense game where you have to keep an eye on your economy and defenses .

AT THE LIMITS OF EARTH, AT THE EXTREMITY OF HEAVEN. A REAL-TIME STRATEGY NIGHTMARE.

Defend your tower for as long as you can from the aliens invading your space! Level up, earn money and new units, and strategically place them in the grid!

Tower Defense meets a Visual Novel narrative. Place an arsenal of towers to halt the invading enemy. Use special abilities such as napalm strikes, EMP blasts, and orbital lasers. A sci-fi space drama, filled with dialogue choices.

Join in on the next gold rush and become a prospector in space. In this unique tower defense you can set up and reposition towers for maximum efficiency and adapt to the environment.

A game where you must protect a ship from an atack of evil robots, with the help of turrets and other devices

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.

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.

Construct and manage your colony anytime, anywhere, any device!!!!

Robowars is back on Steam! Fight off troops of droids for freedom and honor in our classical tower defense game. Lead the forces of the Solar Union to protect the peaceful planet of Praymos from the aggressive Trade Confederation.

Toon TD is a free to play Tower Defense from Gee Studios. Defend your castle. Explore new environments. Face fierce bosses. Develop new and unique strategies for every level in this next evolution of the Tower Defense genre.

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!

Space Nature Attack TD is a tower defense where you can level up and customize tower stats and elements to your liking! Fend off various types of alien creatures across many different sci-fi planet themed maps, biomes, and difficulties!

You control a space station in the form of a cube that protects the planet from invaders.

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.

Escape From The Red Planet simplifies resource management, tower defence, and first-person mechanics into a singular arcade experience. On the latest mission to Mars, the Orion III crash-landed. With Martian attacks looming, Houston most definitely has a problem!

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

A game of the genre "Tower Defense".

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.

Be the ultimate CEO and military strategist in this genre fusion of strategy and business management. Create your own company, hire employees, research weapon technology, and take control of units on the battlefield to defend the moon against an alien invasion. Aliens down, profits up!

A fast paced garden defense game. Collect what you can before the pests take over!

We're happy to present a new game in the Alien Shooter universe! Get prepared to unique tactical gameplay, lots of monster types and 8 fighter types allowing you create your own style of completing missions and defeating bosses.

"Astro Wings: Space War" is a retro style, exciting and authentic bullet hell, space shooting game.This game brings you the thrill, urgency and fantastic experience of an authentic arcade shooting game.

Refactor is a hard-core tower defense game that combines modular building, route planning, and element composition.

A classic tower defense game, ready to build dozens of turrets and use dozens of magic to destroy monsters?

Craft the perfect defense upon shifting platforms, turning gears, and railways to save your llamas from alien abduction in this space western tower defense.

Exo TD is a true 3D space Tower Defense. Invaders have scouted your planet as their next target, you must protect it by building destructive turrets, orbital defenses, shields, drones and more to defend against the incoming invasion force.

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?

Defeat hordes of enemies in this aesthetic tower defense game. The random terrain generation provides a beautiful environment and a unique experience every time you play.

DEFEND 99 is a rogue-lite tower defense game with deckbuilding and autochess elements. Place your turrets, roll for upgrades and balance your economy in the hope of defending your network of the elite from an array of digital attackers. Can you hold off all ninety nine waves?

Tiling Towers is a Tower Defense game, where you expand a predetermined path and survive waves of increasingly stronger enemies and bosses. Choose from 3 randomly generated cards every few waves to unlock new towers and bonuses. Can you protect the Crimson Crystal from destruction?

AVO Escape Space is a dystopian, story-driven escape the room style VR game set in outer space! Assisted by AVO, the spaceship's AI system, you embark on a journey to escape your doomed vessel. To do so, you must engage your mind with a series of intricate and mind-bending puzzles!