Top similar games like The Echoes of Mars:

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.

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.

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?

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!

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 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?

Lead the forces of a human empire in a brutal squad-based RTS. Capture territory, secure vital sectors, deploy fortifications, and unlock new units and upgrades mid-battle to outmaneuver and crush the alien threat.

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 With only an out-of-date AI for company, can you survive?

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!

This is Xhono overwatch space station. Enemy forces are attacking. All kinds of turrets, space station supports and plugins at your disposal. Please use your resources wisely, build your defense, face against all kinds of enemies, and explore the unknown secrets of Xhono.

Defend your planet from waves of robot invaders! Build powerful turrets, upgrade your defenses, and command robot units to fight drones, tanks, and massive bosses. Then send your own forces to attack the enemy planet in this action-packed sci-fi tower defense game.

Beware Planet Earth! is a beguiling mix of classic tower defense and time management coming to PC via Steam for the first time. Save your cows from the Martian invasion by building an effective defense using towers, traps and objects, and also by firing your Zapper directly at the invading force of little green men!

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!

Neon Grid Defenders is a sci-fi roguelite tower defense game featuring a free and unique upgrade system, decision based path generation and a strong but static difficulty curve. Build your path, place your towers, hook them up with upgrades and melt your enemies!

A classic single-player RTS set in a Solar System ruled by megacorporations. Journey from Mars all the way to Planet 9 and uncover the secrets of the BlackChain.

Tricky maps, insane waves. Once you master the path, enemies are nothing.

Top down stealth based puzzle game about an alien stealing cows from a farm. Use futuristic gadgets and stay in the shadows to avoid detection. Get all golds in every level to appease the queen and bring honor to your colony!

Take this shoot to the moon! Help this space cat on their mission to the stars by fixing generators, dodging lasers, and keeping the last plant alive in Hydropawnics!

Year 2425, humanity colonized the exoplanet named SACH-041840. But then, in the 55th year "they" came; No one knows who or what controls them, but what is known is that if they reach the colony proper, it will be annihilated. It is up to you to bring the WRECKONING upon them!

Frontier Control: Invasion is a Real-Time Strategy survival game in which you play the commander of a human space colony under the attack of outer space robots. Build your base, train your colony, and fight herds of enemies and bosses.

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

Tactical control meets strategic execution in this real-time, action tower defense. Develop classes of customized units and leverage different vantage points to defend your stake and ensure your colony’s survival.

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

Defend your starship in this endless sci-fi tower defense game! Form your ultimate squad of 2D heroes, permanently upgrade your spaceship's hull and defenses, and unleash powerful ultimate abilities to survive relentless waves of cosmic alien invaders in the vast void.

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.

Build your mobile outpost and combine over 20 weapons with 100+ items to create unique builds. Grow stronger against endless enemy hordes, conquer new planets, and experience the thrill of evolving from desperate survival to overwhelming firepower.

SEND YOUR CREATURES! Build an army of upgradable creatures, hold the increasing amount of lanes and destroy the enemy Portal before you're overrun!

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

4 turrets, a ship in peril, and waves of enemies. Hold the line and defend the ship, robot.

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

Sci-fi tower defense meets ARPG-like hero combat. Build towers then fight alongside them with your hero as you battle through a campaign to uncover the fate of a colonization effort on a distant planet.

A light tower defense game with unique planet exploration. Defend against aliens, collect resources, and build a new home. Exquisite graphics and challenges await!

Competitive endless sci-fi tower defense game with global leaderboards where you strategically place and upgrade Glowbots to stop waves of enemies across vibrant space maps.

Battle Among Stars – Alien War Five Houses. One galaxy. You are the heir thrown into the war. Command fleets, assemble modular units, forge fragile alliances — every decision reshapes the balance of power. Free demo available now.

"In 'Random Core Defense,' acquire and enhance cores using limited resources to withstand relentless enemy onslaughts. Defeat powerful bosses and test your strategy to survive until the very end!"