Top similar games like Grey Goo:

After the destruction of the EARTH in 2150, the leaders of the Eurasian Dynasty escaped on board an evacuation fleet. Now they are fighting for the survival of the human species. Their base is one large building comprising of smaller variable parts.

Includes 47 Steam achievements, leaderboards, and stats!

Executive Assault is an indie real-time strategy/first-person shooter where you can not only build your base and create armies, but also take control of your units and fight as one of them.

The last days of man are at hand.. Two years after the Infinite War the once great warring nations now lie in ruins, and humanity’s hope for a brighter future is nothing but a bitter memory. A new, seemingly unstoppable enemy, supported by the zealots of The Order, now seeks to eradicate mankind: UEF, Aeon Loyalist, and Cybran alike.

This is more than just an odd looking strategy game, it is a strategy platform. Genetically engineer amorphic creatures & buildings, in real time, in an endlessly open world that adapts to your playstyle. Share, and even battle your designs. How much will they be worth?

Build amongst the stars in Starport Delta, a light sci-fi strategy game that focuses on survival. Station Commanders across the universe will turn to you for guidance to expand, defend, and survive. Help them build a thriving station, but watch out, there are many dangers hiding in space...

Wage war across entire solar systems with massive armies at your command. Annihilate enemy forces with world-shattering TITAN-class units, and demolish planets with massive super weapons!

For a thousand years, three opposing forces have waged war for what they believe is true. There can be no room for compromise: their way is the only way. Dubbed The Infinite War, this devastating conflict has taken its toll on a once-peaceful galaxy and has only served to deepen the hatred between the factions.

{{An RTS inspired by the classics of the past!}} Making up for it's subpar retro graphics with fun gameplay and modern multi-threaded tech enabling huge battles to run smooth... Featuring singleplayer challenges, skirmish, sandbox, 10-player multiplayer & workshop modding.

Satellite Reign is a real-time, class-based strategy game, set in an open-world cyberpunk city. You command a group of 4 agents through rain-soaked, neon-lit streets, where the law is the will of mega-corporations.

The RTS/FPS phenomenon has moved into space! Build your base on an asteroid, command fleets of starships for epic battles, pilot fighters, mine and trade resources, assemble robots to defend or assault other stations. Take sole command or share the glory as you fight for control of the quadrant.

Halo Wars: Definitive Edition is an enhanced version of the real-time strategy classic, Halo Wars, updated to run natively on PC. Halo Wars: Definitive Edition includes improved graphics, new achievements and all of the DLC created for the landmark real-time strategy game.

Volta-X will no longer be available for purchase on 8/5/2022, and all multiplayer servers will close on 11/4/2022. Command the pilots of a gigantic mech in epic RTS combat! Take the fierce opponents on as you expand and power up your arsenal of Voltas, weapons, and animal pilots!

The third and final expansion to the genre-defining and critically-acclaimed RTS, Dawn of War. In Soulstorm, two new armies are introduced – Sisters of Battle and Dark Eldar - raising the total number of playable armies to nine.

A classic real-time strategy game with an epic single player campaign, multiplayer & coop, set in the alternate reality of 1920+

The year is 2047. A massive nuclear fireball explodes high in the night sky, marking the dramatic beginning of the Third Tiberium War and the long-awaited return of the most groundbreaking Real-Time Strategy franchise of all time

Fight till you can't then fight some more! A space combat simulator with survival crafting elements.

Comfortably paced, match-based strategy with a PvE twist, contrasted with intense physics-based combat. Take direct control of tanks, infantry and ships across space and planetside. Manage your powerful deck of commanders and battle with up to 6 players! Will you rule or unite Omega Centauri?

SPACECOM – a strategic-to-the-bone, starfleet command game in which deception, smart movement, and choices to battle decide victory or defeat.

Help humanity to spread throughout the cosmos by exploring new worlds, building space factories and setting up trade routes. Research advanced technologies to increase efficiency and unlock new paths of development. Fight off other artificial intelligences in your goal to reach the Final Upgrade!

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!

Stake your claim, command your fleets, and wage epic war in space.

All of Warhammer 40,000: Dawn of War in one glorious package. Play the genre-defining classic real time strategy game in all its blood-soaked glory, including four complete campaigns and nine full-fledged factions.

Halo: Spartan Strike makes you a Spartan supersoldier battling evil forces. Delve into 30 challenging missions through cities and jungles using a devastating arsenal of weapons, abilities and vehicles including the iconic Warthog against the Covenant and Promethean enemies. *DirectX feature level 10 required*

Moduwar is an adaptive organic RTS where you control an alien creature, Modu - and your body is your army. Grow new organs, split, merge and mutate them into unique units that adapt to your needs as you fight against human and alien threats in single and multiplayer modes.

Expansion VR is a sci-fi tower rush RTS built for Virtual Reality, featuring indirect control gameplay. Collect futuristic units, command your forces, and crush your opponent’s base in fast-paced PvP and PvE battles across the galaxy.

Empyrean Frontier is an epic real time strategy game that mixes classic RTS gameplay with a multi-stage campaign in which the player commands a fleet of ships through a galactic map. Boss battles, base building, planet destroying superweapons, and tactical skirmishes create a unique blend of genres.

Space Gears is a next-generation Strategy set on Mars. Don't fret about micromanaging build orders, or your resources. Set your sights on victory by raising an army of mechs and build up your base in this fluid and fast-paced PvE and PvP strategy game.

ZeroSpace is the first ever RTS where all game modes(single player, co-op, PvE, and PvP) are played in a shared MMO galaxy map. Contribute towards the war effort through conquering planets and fortifying alliance strongholds. Wishlist ZeroSpace now to get updates about our launch!

Join our machine legion to conquer the world.

A sci-fi real-time strategy game. An existential war among asteroids in classic RTS style. Build and defend, produce and upgrade, attack and annihilate!

A fast paced multiplayer shooter that pits aliens against humans in a strategic and action-packed struggle for survival!

Battle for galactic dominance in this real-time 4X strategy game with unrivaled scale! You’ll explore, expand, exploit, and exterminate through military force, diplomacy, trade, culture, influence, and other underhanded tactics.

With 100+ truly unique units, Zero-K is an RTS of freedom and creativity, tempered by a decade of refinement. Sculpt land into a castle and throw invaders off it with a Jugglenaut. Explore a massive campaign, solo or co-op. Hop online for epic 32 player battles or fast paced 1v1, on 100s of maps.

Take command of mighty Vikings, sly Persians or brutish Demons! Destroy your opponent’s base while defending your own in this action-packed side-scrolling RTS!

ENDLESS™ Space 2 is a Strategic Space Opera, featuring the compelling “just one more turn” gameplay, set in the mysterious ENDLESS™ Universe. As the leader of your civilization, will you impose your vision and build the greatest stellar empire?