Top similar games like Space Mantlet:

Get ready to protect the entire solar system from an unprecedented threat - the D'Ahari, a race of insect-like aliens. Control an entire fleet of spaceships, trade with other races of an Alliance, and develop your own space station.

Expansion is a sci-fi Action RTS where deck-building strategy meets fast-paced VR duels — battle AI or challenge real players.

Join our machine legion to conquer the world.

Co-op and Single player Tower Defense genre.

Tower Defense with resource- and base management! Waves of enemy robots with special abilities, shield and armor! Mining, refining and production for building and repairing! Environmental hazards and the best: the Orbital strike!

A grand and intense tower defense science fiction game, where you only need to purchase once to enjoy all the content of the game.

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.

You are the commander of the Black Talons company, currently stationed in the Oberon system. After an eventful campaign, the military Tzanar Union has overrun the planet of Genai and blocked all departure from the system: leaving you and the Black Talons stranded.

The early stages of an RTS I created in a gap year. Create your loadout, send your mechs to battle, capture objectives and destroy the enemy base

“Alien Marauder” is a real-time strategy game with survival and confrontation theme. In this game, you will be the leader to a treacherous alien planet, build and defend base to survive against the vexan waves. Make the right decision!

An exciting sci-fi real-time strategy game. You are the leader of a band of elite Marines on a rescue mission; it is your job to secure the outpost and rescue lost miners. Aliens are running amok; it won't be easy...

Protect the base from an alien invasion. Place cannons and destroy the invaders. Upgrade cannons to resist the enemies.

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.

2089 - Space Divided is a classic science fiction real-time strategy game in which you collect resources, build up your base, train troops and destroy your opponents with tactical skill.

Para Bellum - Hold the Line is a 3D real time small unit tactics game. Your task is to hold off enemy attacks wave after wave using a variety of different Units and Supports in your arsenal to the best of your abilities in Campaign and Skirmish modes.

Build mechas, form mecha teams, and command them to fight.

Star Trek: Prelude is a space-based game that builds defense towers on earth to defend against alien invaders called Black Ember.

Lead the Mobile Infantry in this RTS game set in the Starship Troopers film universe. Balance your army composition with a diverse set of unit types, overcome line-of-sight and line-of-fire challenges through tactical positioning, and use special abilities to smash the Arachnid hordes!

《热血指挥官》是一款科幻RTS游戏，实时战略对决，万人在线竞技。在危机与机遇并存的银河系中，你将成为一名银河指挥官，掌握高科技武器和装备，指挥数百个战斗单位，运用智慧和策略与异形及其他势力展开激战，书写属于你的星际传奇！

In this game, you are a leader, leading a force of army to fight other forces in the deep spaces. You will plunder their resources, build your homelands, explore and expand, managing your army both strategically and tactically. This will be a saga written with blood and fire.

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

Defend galaxy against Alien invasion in the RTS offline game with roguelike fun

World of Towers combines puzzles with tower defense. Design your base in order to collect all of the puzzle pieces and destroy your enemies. Create and share your own worlds on the Steam Workshop using the World of Towers World Builder

Space 4X game with the ability to build factories, extract resources, with characters, internal and external markets ... Take part in the discussion of the game, share your vision)

Fight for control of a frontier world. Gather resources, build your base, and command your forces in battle. Survive long enough to unleash your ultimate weapon - THE EPIC.

Temporal Titans is a Tower-Defense game with Time Travel. Send mechs back to previous waves to prevent your defeat, and protect your salvage team from the monstrous Grell as you scavenge the ruins of a lost earth. Rewind, rethink, and reclaim the future!

Plebs is a casual real time strategy game about controlling ancient Nations to victory through strategic town building, creating mighty and diverse armies, and intelligent resource management. Battle through the Campaign, Survive endless waves of enemies, or Skirmish on a variety of levels.

In Vermin Control, you will enter a thrilling sci-fi tower defense world filled with strategic combat and high tension. Operate a versatile unit capable of both melee combat and construction, deploy and manage 9 unique devices, and protect key facilities from relentless vermin assaults.

Leave No One Behind is tactical real time strategy war game. Experience some of the hardest battles fought during the Vietnam War in 1965 between US Army and the Army of the Northern Vietnam for landing zones X-Ray and Albany and for Plei Me special forces camp.

Real-time dynamic tactics with the strong focus on squad positioning and collaboration. Connect to the warzone from your home PC and orchestrate modern military operations from the Drone Perspective.

On the cosmic frontier, humanity has fought alien species for a century. As traditional defenses fall to new-gen alien mechs, tech giant ShellMobile—human-centered at its core—kindles new hope via breakthroughs in extraterrestrial titanium ore research.

Gear up and get going! Defend your outposts from waves of alien enemies with your mech. Build and upgrade your base, protecting the extraction of the mysterious planetary system’s rich resources!

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!

Enjoy this full strategic Tower Defence with something more. To complete each level you must defend from hordes of aliens and then attack their Teleports to stop them from coming. And, in the end, defeat the Bosses!

A sci-fi, 4X, real-time strategy game. Build, fight, and explore to survive against an unstoppable alien threat. Carry the fight from one galaxy to the next as you battle back from the brink of extinction, and unlock the secrets of the past to restore your people to the path of galactic super power.