Colloblast: Kingdoms of Cosmos
A sci-fi RTS game with base building and resource gathering.
The top results based on the latest update are BlackChain [Score: 1.1], Space Alliance: Frontier [Score: 1.1] and Grimstar: Prequel [Score: 1.1] The top rated games you can find here are Tempest Rising [SteamPeek Rating: 7.5] ranked #32, Galactic Civilizations® II: Ultimate Edition [SteamPeek Rating: 5.5] ranked #14 and IDUN - Frontline Survival [SteamPeek Rating: 5.0] ranked #11 Also don't forget to check the newest releases Space Tales [Release date: 2026-03-13] ranked #24, Space Tower Defense [Release date: 2026-03-09] ranked #25 and Buzz Wars [Release date: 2025-11-27] ranked #16 While it is tempting to play with the newest and the best, there might be some other gems in the results, like Galactic Civilizations® II: Ultimate Edition [SteamPeek Rating: 5.5] ranked #14, Tempest Rising [SteamPeek Rating: 7.5] ranked #32 and.
A sci-fi RTS game with base building and resource gathering.
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.
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.
This is a prologue for the main game Grimstar - a single-player real-time strategy game with a story-driven campaign. The sudden death of your brother has hit you hard. However, the corporation for which he has sacrificed his life requires you to take his place until his contract is fulfilled...
Bite size colossal battle! Build an army in minutes as infantry upgrade with orbital drops into war machines! Then combine those machines to form the giant Mantlet mech! All while bullet hell rages! In a transhuman future, command Mantlet One to secure New Terra!
Build, trade, and survive in a living ecosystem where every choice shapes the colony and every faction remembers. Deep systems connect production, management, and survival in a world that never stops reacting.
“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!
Element is a realtime strategy space game for people who don't have time to play realtime strategy space games. Generate energy, mine element, build attack and defence units, and destroy the enemy while maintaining a balance between earth, air and water.
TEP the destroyer is a single player tower defense game where you will face alien monsters and ships in ground and space battles! Your strategy will decide the fate of your people in a sci-fi environment of varying difficulties!
Wonder Defense: Chapter Earth is a strategy game based on Earth and Aliens in which you act as a General to accomplish survive and move to Mars.
"A sci-fi strategy game"
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!
Lead your civilization in a galaxy brimming with life and intrigue. Seamlessly explore and expand across uncharted worlds, from their surfaces to the stars. Forge your destiny in this sci-fi 4X offering a unique blend of grand strategy, planetary city-building, and RTS combat.
As an Artificial Sentience, transform The Hotel—a derelict customizable spaceship—into a beacon of hospitality for six alien Factions. Master the Action Hex, expand your Neural Network, and explore spectral entity hauntings in this deep sci-fi management game.
Get the complete GalCiv II saga including Galactic Civilizations II: Dread Lords, the expansion pack Dark Avatar, and the newest expansion pack Twilight of the Arnor!
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.
Buzz Wars is a wasp and bee themed strategy and fighting game with multiple playable units, various paths to win and multiple maps. Face off against other players in the multiplayer mode, or compete with AI opponents. Find your strategy - are you more a builder, a fighter or both?
Warfactory is an automation RTS where production defines the war effort. Build assembly lines to forge an army of machines, then feed thousands of units into massive real-time battles where every loss must be replaced by your factory.
Join our machine legion to conquer the world.
Build your towers, plan your efforts, watch out for changing paths and strike back against the alien invaders in this challenging tower defense game!
The next major game in the Planetary Annihilation universe, Industrial Annihilation combines the iconic real-time strategy of the beloved Annihilation games with deep factory-building to deliver a blend of genres unlike any you’ve experienced before.
Astro Industry Wars is a lighthearted take on the RTS genre featuring distinct unit types, base building, economic production chains, and customizable unit rosters.
Hyperwar is an RTS game with many classic elements such as base building, research, unit production and resource gathering, but it also contains new approaches and ideas. Paired with modern graphics and a freely moving camera, this game is a completely new experience in the genre.
Embark on an exciting mission to establish a colony on Titan, Saturn's enigmatic moon. Following Earth's collapse, humanity's fate rests in your hands. Gather essential resources, excel in trading, and combat ancient technology to secure our future on Titan's harsh frontier. Will you prevail?
A sci-fi real-time strategy game where you build fortified bases, manage resources, and command retro-futuristic armies against multiple asymmetric alien factions. Capture powerful enemy bosses and turn them into allies. Master unit control, base-building economics, and counter-strategy to survive.
A strategic space tower-defense game. Enemies detect, warn, and try to bypass defenses, forcing you to adapt. Combine diverse towers and face unique maps for varied battles. With tense sci-fi atmosphere, it delivers a fresh experience beyond traditional tower defense.
A harsh sand planet has become the stage for a brutal war between three Great Clans. For the power over rare minerals each wants to prove their superiority. In the heat of dynamic battles with the enemy's troops, be prepared to face and attack giant Sand Snakes.
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.
Block Strategy is an RTS Base Defence roguelite with a fully destructible world. Build your base and find fuel to power your reactor before you're overrun by an onslaught of enemy robots.
In this massive RTS game, command vast armies fighting for control of entire worlds. Control the forces of Earth, the mechanical AI Substrate, or the enigmatic Post-Human Coalition as you battle across the solar system in single player, cooperative multiplayer, or competitive multiplayer.
All that matters is that you're a spaceship captain. Your objective is to explore the far sector. Build, develop, and research. Get to the bottom of the targets of your mission and find out the truth of what happened before it.
Defend galaxy against Alien invasion in the RTS offline game with roguelike fun
Command distinct factions in a desperate struggle for power and resources in Tempest Rising - a classic RTS set on Earth after a nuclear war.
Lead the operations of an artificial intelligence program with only one aim – to clear the Earth from the remains of humanity. Conquer the world campaigning on a single-player dynamic battleground or play with your friends during a real time strategic gameplay.
Grey Galactic is a real time strategy game in space where you build up your planets and ships to conquer your enemies. Develop your empire and fleet of spaceships to destroy your enemies and take over the galaxy! Do you have what it takes to become the best Fleet Captain the UFMC has ever seen?
Take control of a fleet commander returned from exile, rise through the ranks of the United Space Federation forces and join an epic war across the stars.
Hell of Men: Blood Brothers is a real-time strategy game, developed by one person, in which you will have to collect resources, build your base, train your army by choosing your soldiers wisely and fight.
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