Games like Grey Goo

Homeworld: Deserts of Kharak is a strategy game set on a harsh desert planet. Players lead a caravan across the dangerous terrain, fighting enemy forces and unearthing ancient artifacts. The game features real-time tactical combat and extensive base-building elements, challenging players to manage resources and adapt to changing environments. This prequel to the classic Homeworld series explores the history of the Kharak people and their journey to find a new home.

Act of Aggression - Reboot Edition is a real-time strategy game set in a techno-thriller World War III scenario. The game offers a full overhaul of the original, including a new resource system, playable builder units, and improved mechanics for smoother gameplay. Command one of three global superpowers, each with access to advanced military weaponry, and engage in intense battles in volatile conflict zones.

"Iron Harvest is a dieselpunk RTS set in an alternate 1920s, where players control giant mechs in singleplayer, coop, and multiplayer modes. The game features epic battles between traditional and scientific progress, following the end of a great war and the discovery of mysterious war machines."

Crossfire: Legion is a real time strategy game featuring tactical action in furious battles across a shattered version of the near future. Raise and customize your army to engage in intense online combat and carve your own path as you rise through the ranks. It’s a new generation of warfare.

"Etherium is a real-time strategy game set in a science-fiction universe with three factions vying for the rare resource 'Etherium'. Experience single-player Conquest mode, managing resources and bases, commanding units, and battling anomalies. In multiplayer, team up or engage in deathmatches with up to 4 players, with each faction having unique strengths, weaknesses, and tactical skills."

Forged Battalion is a real-time strategy game set in a world devastated by climate change, where you must join the resistance and fight against the dominant military force, "The Collective." As a commander and engineer, you have control over your faction's units, factories, superweapons, and economy. Customize your faction's blueprints, manage resources, and unlock new technology to evolve your units and gain an advantage in battle.

"8-Bit Armies is a retro-style Real-Time Strategy game, featuring 25 offline missions, 12 co-op missions, and multiplayer/skirmish modes for up to 8 players. Construct your base, amass an army, and engage in battles with destructible environments and easy-to-understand military units. This colorful voxel art game offers classic base-building mechanics and various difficulty options for AI skirmishes."

Tempest Rising is a classic real-time strategy game blending 90s and 2000s RTS elements with modern design, set in an alternative modern-day war scenario. Players choose from three unique factions, each with distinct combat styles and economic strategies, offering deep and rewarding tactical gameplay. It emphasizes strategic base-building and diverse, engaging battles.

"SpellForce 3" is a fantasy real-time strategy game that combines compelling RPG elements, allowing players to create their own hero and build their own army to fight epic battles in a stunningly visualized world with a deep, emotional story. Despite some bugs and grinding, the innovative mix of RTS and RPG, along with the option for co-op and PvP gameplay, makes for a marvelous and exceptional gaming experience.

"Warhammer Age of Sigmar: Realms of Ruin - Ultimate Edition is a real-time strategy game set in the iconic Warhammer universe. Lead four unique factions in a cinematic campaign to conquer the savage Realm of Ghur, and engage in comprehensive multiplayer matches. This edition includes additional customization options, alternate hero skins, and a hero pack."