Against the "smart germs" of tomorrow's biowarfare, nanites will be our drone soldiers, but for how long? Enter the fluid living world of Cell (grown from "dynamic voxels") to live through the emergence of new life: YOU, a nanobot who shoots deadly colloids and monofilament clouds, builds defenses, pathways, and supercharged weapons, deciphers sinister enemy nanotech, and LEARNS. Tactics, strategy, then awareness drive you to save your patient, your host... your new home?
The game has a story, too. A sick girl, a man-made disease, scheming bureaucrats, and a nanobot army fighting the inorganic plague... while gradually developing a mind of its own.