A 20-minute version titled Hamlet: Out of the Ashes is currently on tour.

The Spanish version, titled "Loba", premiered on the same day as well.

It is available in an English version titled Retracing a Nightmare.

Like the previous generation, an enhanced version titled Pokémon Crystal was later released.

An adult version of the children's story, titled The Butterfly Effect, was also released as a gift book.

The Japanese version, simply titled Contra, allows the player to begin the game at any of the first four stages.

Mok's version, titled Close to You, was used as the main theme of the movie.

In 1975, a syndicated version titled Match Game PM started.

However, an English-language version of the game, titled Shadowland, exists.

A second version of the game, titled Bachelorette Party, also exists.