Aside from the faction and settlement groups, Shades of Immortality also holds four guilds of sorts. These function as the groups for businesses. To join these groups, contact an admin or a leader of the group. As always, this list may expand, and if you want to create a new guild, contact an admin!
While a character can be in only one faction at a time, they can join as many or as few guilds and groups as they want.