Mob (video games)
IN AN MMORPG OR MUD, AN NPC THAT IS HOSTILE AND/OR VULNERABLE TO ATTACK, ESPECIALLY GENERIC MONSTROUS NPCS THAT THE PLAYER IS EXPECTED TO HUNT AND KILL, BUT EXCLUDING THOSE THAT ENGAGE IN DIALOG, SELL ITEMS, OR WHICH CANNOT BE ATTACKED
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A mob, short for mobile or mobile object, is a computer-controlled non-player character (NPC) in a video game such as an MMORPG or MUD. Depending on context, every and any such characters in a game may be considered to be a "mob", or usage of the term may be limited to hostile NPCs and/or NPCs vulnerable to attack.