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Given the team-based competitive nature behind many first-person shooters, these games usually come with bots for the player to play with/against in an offline game, in order to benefit users with limited or no internet access.
Another distinct definition of bot is that of a computer program which is commonly designed to perform monotonous or hard-to-achieve tasks such as "farming" and raising levels in RPG-type games. As a result, most RPG games have banned them from use because it is considered cheating. In FPS games this type of bot is also known to be a form of cheating. It helps players achieve better scores by improving their aim and reflexes which, in the extreme case, are completely controlled by the bot software.
They can't go through Npc clip.