RP: roleplaying

DM: Dungeon Master

PG: Player Guide

PL: Player Lead

PC: Player Character

NPC: Non-Player Character

IC: in-character

OOC: out-of-character

IG: in game

PK: player killing

PvP: Player vs. Player

PnP: Pen and Paper (a style of tabletop roleplaying)

DnD: Dungeons & Dragons

NWN: Neverwinter Nights

AoE: Area of Effect

MS: Move Silently