Spoilers Off. You've been warned!
- Luke, I Am Your Father: Meta-example in the casting: British actor Mark Sheppard voices Michael Ford, and his dad, Morgan Sheppard, voices the Big Bad...John Adams.
- The Other Darrin: The first game took a Celebrity Voice Actor approach, with W. Morgan Sheppard as John Adams, his son Mark Sheppard as Michael Ford, and Kevin Sorbo as Prometheus. The sequel re-casts all the characters with video game voice actors, most notably Duke Nukem's Jon St. John as Michael Ford.
- Refitted for Sequel: Unlockable Concept Art for the game reveals that one level set on an oil rig was planned to be in the game, but ended up being the first level of the sequel instead.
