Unnkulian Underworld: The Unknown Unventure is a text adventure that began the satirical Unnkulian saga and was developed with TADS, the Text Adventure Development System.

As Kuulest’s slave, the player must recover the Orb of Studosity from the evil Unnkulians. The adventure begins when the Hermit Kuulest dies and leaves a cryptic message about saving the world.

The game features extensive descriptions of locations and is fully keyboard controlled through a dozen types of commands.