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Duck (Chinese: 醜小鴨, a literal translation meaning Ugly Duck, also known as Duck Maze) is an unlicensed clone of Doki Doki Penguin Land, made for the Famicom in 1987 by Bit Corp. and released in Taiwan, Australia and Brazil by Bit Corp., HES and Dismac respectively.


Duck Gameplay

Duck's gameplay.

This game plays similarly to Doki Doki Penguin Land, a Sega SG-1000 and MSX game that had been released in 1985. In it, you control a duck pushing an egg downwards into an underground living room. Like some early Famicom titles, the player can start on any level (or scene as this game calls them) and there are 20 in total. In a similar way to Lode Runner, the player can dig through the ground with the A button and dropping the egg too far causes it to break, resulting in the player losing a life. There are three lives and no continues.

The graphics are based on those from Doki Doki Penguin Land, although they're not exact and the stages are palette-swapped.

There is only one music track, which plays during gameplay. This track is original, although it may be based on the 18th-century folk song Long, Long Ago, which is heard in The Oregon Trail.



  • Being made in 1987, this is the second unlicensed game known to have been made for the NES or Famicom, after Super Maruo in December 1986.
  • The original release is subject to freezing, upon counting point when a stage is cleared, because Bit Corp. used an instruction that is not available on the NES CPU.