In any adventure, the party of player characters (PCs) will inevitably encounter other intelligent creatures and people. These are the non-player characters (NPCs) of the world that are largely controlled, run, an enacted by the game master. There are moments (and some systems greatly support these moments) where an NPC will be "taken over" by a fellow player at the table to reduce the load on the GM or to allow for a wider variety of interactions. That topic, however, is an entirely differen...