The term, Underworld, could be referring to any of the following:
- Underworld (The Last Valkyrie) - A location and kingdom in The Last Valkyrie
- Underworld (City Rush) - A location that some events in the City Rush series takes place.
- Underworld (Skip and Sqak) - A small level that appears in Skip and Sqak. It is where the evil go after they die.
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