I've seen the term being used but i don't know what it means, i'm pretty sure it refers to characters related to quests, such as characters with names. but i don't know the actual words of the acronym

Non

Player

Character


As opposed to PC. Player Character. You're the PC, everybody else is a NPC.

A term all kids once knew since it was a staple diet of pen and paper RPGs- Role Playing games. Now with computers the word has transferred to that.