- Author Existence Failure: One of the main writers and designers of the game, Dave Cummins died in 2008.
- The Other Darrin: Played with. Joey can use different robot "shells" throughout the game, some of which change his voice tone and/or attitude towards things.
- Talking to Himself: The voice actor who plays Hobbins also voices several other minor characters, and there are a few times when they both exchange words.
- Adam Henderson, the voice actor of Robert Foster plays both as Gallagher and Stephen Reich.
- What Could Have Been: The game was originally titled Underworld but it was renamed due to the release of Ultima Underworld: The Stygian Abyss.
- Working Title: Beyond The Abyss.
Trivia / Beneath a Steel Sky