Cancelled sequelThe game had an open ending because the developers were already planning a sequel. Unfortunately, the sequel was canceled because of poor sales of the game.
Family portraitA family portrait of the Covenants is displayed in several rooms of the estate (and on the box, and in the advertisements...). While it is a striking picture, it is also impossible according to the time lines presented in the documentation and story. The picture shows Jeremiah seated in his post-war infirmed state. Jeremiah did not return from the war until after Lizbeth's death and Aaron's disappearance.
- A good deal of the music files used in Undying are actually recycled directly from Dreamworks Interactive's previous game, Trespasser. For example, the music that plays during the boss battle with Ambrose in Undying also plays during your first meeting with a T-Rex in Trespasser. The music which plays during Undying's final battle is taken from the Town level of Trespasser when you find two T-Rexs fighting each other.
- In the main theme song, you'll hear the choir sing "Spiro Spero, Spiro Scio." In latin, that roughly translates to "hope to breath, Hope to understand."
Player characterOriginally, the hero of the game was supposed to be Magnus Wolfram, a large, creepy-looking man with a bald, tattooed head. When he was introduced to the project, Clive Barker suggested that the team develop a more human, identifable protagonist (which led to the creation of Patrick Galloway).
Magnus' character model still exists in the game, however. It's used for the creepy Trsanti shaman that Galloway fights in the game's opening cinematic.
In an E! Online interview, Barker actually said (about the main character):
Make him somebody I want to sleep with. (...) What we had before was this kind of big fellow with all these tattoos, but there wasn't any charisma there. I think we needed somebody who the player was going to want to be...It would be like having Regis Philbin playing Indiana Jones.
- 2001 – Best Sound of the Year