Grey Goo

On Ecosystem 9, intelligent lifeforms clash over the resources and control of a frontier world. In the single-player campaign, you command the defensive Humans, versatile Beta, and highly mobile Goo; multiplayer also features the Shroud.

Gather resources, establish a base, produce units, and lead forces into real-time battles. Factions use different approaches, while tech upgrades can alter units and powerful Epic units can deliver decisive blows.

The game includes a single-player campaign and online or local-network multiplayer. Replay and Observer modes, skill-based matchmaking, and a map editor with Steam Workshop sharing provide additional ways to play.

Players who enjoy Grey Goo often point to its distinct faction designs, especially the Goo, and its classic resource-gathering, base-building RTS approach. Some also praise the campaign’s sci-fi story, cinematics, and soundtrack. Other reviews find the combat slow or repetitive, the campaign too short, and the multiplayer scene inactive.