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In general usage, difficulty level refers to the relative difficulty of completing a task or objective.
In computer and video games, the term specifically delineates the ease or difficulty with which an average user may complete a game or a part of a game. Arcade games as well as many early console games included the difficulty level as an explicit setting. For example, games such as Tempest would prompt their users to choose "easy", "medium", "hard", or similar options before beginning play. Some games, however, maintain the former practice to a degree—often harder versions of the game...