Games like Grey Goo on Steam
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Aven Colony
Build a new home for humanity in Aven Colony. Discover Aven Prime - an alien planet of deserts, tundras, and wetlands light years from earth. Build your colonies into massive, sprawling cities whilst dealing with the challenges faced when settling on a new world.
Forts
Unleash your creativity and strategic prowess in Forts, the exhilarating physics-based RTS! Design, construct, and customize imposing fortresses, bristling with devastating firepower, and blast your opponent’s buildings to rubble!
FTL: Faster Than Light
This "spaceship simulation roguelike-like" allows you to take your ship and crew on an adventure through a randomly generated galaxy filled with glory and bitter defeat.
X-COM: Apocalypse
There's something evil in the city tonight... Earth has been ravaged by human excess, petty conflict and alien invasion. The world's population has been herded into huge cities, the first of which was Mega Primus. 2084: A Utopia shattered, social collapse and civil unrest reigns in Mega Primus. Fiendish aliens terrorize the city.
X: Beyond the Frontier
The Human Race had advanced to the point where we could travel among the stars, we developed giant automated machines to help us colonise other worlds, but there was a fault in their programming and they turned and attacked. Forcing us to lay a trap to protect Earth and exiling the Human race to stay on Earth once again.
Children of a Dead Earth
The most scientifically accurate space warfare simulator ever made. Now with Steam Workshop!
Wargame: European Escalation
The New Fatal Error DLC includes a new 5-mission Operation and touch-screen controls.
Wargame: Red Dragon
The new reference in RTS at its best! The Wargame series returns to duty, larger, richer and more spectacular than ever before. In Wargame Red Dragon, you are engaged in a large-scale conflict where Western forces clash against the Communist bloc.
Scythe: Digital Edition
Scythe transports you to an alternate reality in 1920s Europa, one ravaged by the First World War. Take up the role of leader by assuming command of one of 5 factions, and set out to conquer the coveted "Factory". Lead your mechs to war and your people to victory!
Anomaly Warzone Earth Mobile Campaign
Anomaly Warzone Earth Mobile Campaign continues Steam's Anomaly Warzone Earth in an extra 15-level campaign. Originally released on mobile devices, the campaign is brought to Steam for PC, Mac and Linux exclusively in Anomaly Bundle. AWE Mobile Campaign turns tower defense on its head.
Pandora: First Contact
Pandora: First Contact is a science fiction 4X turn-based strategy game on a planetary scale. Our Earth has been exhausted and colonial attempts on other planetary bodies have been in vain. Finally, after decades of exploration, an interstellar probe has brought promise of a new world.
BATTLETECH
Take command of your own mercenary outfit of 'Mechs and the MechWarriors that pilot them, struggling to stay afloat as you find yourself drawn into a brutal interstellar civil war.
MechWarrior Online™ Legends
MechWarrior Online™ Legends is a tactical, 'Mech-based online shooter set in the vast BattleTech Universe. Assume the role of an elite MechWarrior, piloting powerful BattleMechs, fighting for supremacy over the Inner Sphere.
Aliens vs. Predator™
Survive, hunt and prey in the deadly jungles and swamps in distinctly new and thrilling first person gameplay.
Eufloria HD
Experience “Eufloria HD”, the new edition of Eufloria, an incredibly addictive ambient strategy game that anyone can play! Explore a beautifully realized universe rendered in a style that is unique and compelling.
XCOM®: Chimera Squad
XCOM: Chimera Squad delivers an all-new story and turn-based tactical combat experience in the XCOM universe.
Blood Bowl - Legendary Edition
Inspired by the Warhammer Fantasy world, Blood Bowl is an ultra-violent combination of strategy and sports games. The Legendary Edition features 20 playable races, including 11 that are totally new, each offering its own game style! Make a competitive team, train it and buy the best equipment.
Warpips
Warpips is the ultimate quick to learn but amazingly deep tug-of-war strategy game. Deploy the right composition of soldiers, tanks, helicopters and planes in this tight, streamlined strategy-focused war game. Compose the best army, research the right tech; overwhelm your enemy!
Heroes® of Might & Magic® III - HD Edition
The most popular Heroes® title of all time is back in HD! Fifteen years later, rediscover the epic tale of Queen Catherine Ironfist, as she re-embarks on her critically acclaimed quest to unite her ravaged homeland and re-conquer the kingdom of Erathia.
Blaston
In the slow-motion bullet-hell of Blaston, you duck, dodge, and weave to evade incoming attacks while preparing your dazzling next combos in a flash of skill. You feel like Neo and leave each session with your heart racing in this super fun tactical workout. Most importantly... Never. Stay. Still.
Bloons TD 6
The Bloons are back and better than ever! Get ready for a massive 3D tower defense game designed to give you hours and hours of the best strategy gaming available.
Anomaly: Warzone Earth
Lead an armored squad through the perils of this reversed tower defense action-strategy game!
Master of Orion 2
Forge an empire in a universe where population growth is stripping away planetary resources. Colonize unknown planets and trade with other races for their knowledge.