Marked: These groups are led by, or are comprised of, primarily Marked members.
Inferno: Inferno is an anarchist group comprised almost entirely of marked (With a few non-marked fanatics) who's primary goal is simply to survive and thrive in what they consider to be "The New Order" They consider the laws of the land to be utterly meaningless, and do an excellent job of demonstrating it. The inferno group is informally led by Red Mag.
Dissenters: Marked who admit freely that they are Marked but refuse to kill anyone at all. Triad has flagged them as Refugees. Inferno tends to leave them alone as they figure that even if they are "Jackasses" They are at least jackasses that aren't hostile.
Crown Seven: People of relative power who have become Marked somehow. 2 mob lords, 3 businessmen, and 2 nobodies who have risen to be amongst the most feared people in the world.
Unmarked: These groups are comprised of, or led by those that are Unmarked.
General Populous: Primarily Unmarked. Ratio of marked to unmarked is estimated at 65 thousand to one.
Hunters: Unmarked seeking to become Marked by killing the marked.
Seekers: Essentially information dealers - They can tell you who is an isn't Marked. For a price, that is. Most are themselves marked, but are generally considered to be valuable enough to not be killed.
Triad: Mostly Lower Class Marked, Run by the Unmarked, primarily made up of the Marked. Government organization, acting as both a research and secondary combat unit.
Annihilators: Nearly religious group led by one Marked that have designed the weaponry and equipment required to destroy the Marked and prevent themselves from becoming Marked.