Q*bert is a port of the popular arcade game to the NES. Released in the USA, it retains the core gameplay of the original, involving guiding Q*bert, a cute cube-like creature, around a pyramid of colored cubes, changing their colors to complete levels. The NES version likely included adaptations for the system's hardware capabilities.  Given its status as a port of a well-known arcade title, more information on its development is accessible than for many unlicensed games.

Q-bert (USA)

Pyramid (USA) (Unl) (v1)