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Ocean Software released Dennis on the Game Boy in 1993, a time when handheld games often adapted popular characters into simple, portable adventures. It was based on the Dennis the Menace comic, and like many licensed titles of the era, it tried to capture the spirit of its source material with straightforward action and exploration.

You control Dennis, moving through suburban environments, avoiding or distracting adults, and using your water pistol to cause mischief. The main goal involves progressing screen by screen, often by solving minor environmental puzzles or finding keys to unlock new areas. Gnasher, Dennis's dog, occasionally appears to help by chasing off certain characters or creating distractions. The game moves at a brisk pace, though some sections can feel repetitive due to similar objectives across levels. It feels like a lighthearted, sometimes silly romp through a familiar world, even if the action is simple.