|Descent of the Shroud|
|Release date(s)||January 31, 2016|
The DLC adds the following features to the base game:
- The fourth faction, the Shroud, in multiplayer and skirmish.
- A new unit for each of the original factions: Human Valiant, Beta Squall and Goo Siphon.
- One new campaign mission, Herald of Silence.
The DLC is automatically applied to the Grey Goo base game, and cannot be disabled.
On the same day as Descent of the Shroud was released, the Soundtrack was updated to include all music from the game, and the Grey Goo Definitive Edition pack was released, containing the base game, all DLCs, and soundtrack.