A lot of multiplayer games have these things called instances in which a player is teleported to a zone where NPC's may be (they do not see other players). There they can hack and slash mobs without them being affected in other instances.

How would I go about programming that on BYOND? Originally I thought about playing with the invisibility variable, though I no longer believe that's the right way to go about it.

EDIT: Sorry if this is in the wrong section. Not too sure if it would be in the design philosophy or dev help.