Often grown separately and then grafted onto the character (though occasionally grown directly into his body), comprehensive biomods become part of the “host” once they’re “installed.” Like the prosthetics, they cost Background points, but cannot be exchanged without extensive and invasive surgery.

Installing or removing a comprehensive biomod inflicts one lethal health level for each point in the Background cost, and puts the character out of commission for at least one day per point as he recovers from the operation.