Staff flag is toggled by the command “staff”. If enabled, it gives the char different priviledges, e.g. he can walked overloaded, otherwise it would act like a player char.

Invisible flag is toggled by the “invis” command. If he's invisible, the char can not be seen by anyone with a lower rank (e.g. GM can not see an admin).

Toggled by the command “invul”. If enabled, the char will take no damage.