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A non-player character (sometimes "non-playable character" or non-player class), shortened NPC, is a character in a role-playing game or computer game whose actions are not controlled by the player.

In a role-playing game, an NPC is controlled by the gamemaster. Non-player characters populate the fictional world of the game, and can fill any role not occupied by a player character (PC). Non-player characters might be allies, bystanders or competitors to the PCs.

NPCs vary greatly in importance—from the NPC innkeeper seen once by the player characters, to the NPC arch-nemesis that comes back time and again for an entire campaign.