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Unused level loading screens included with the Deathmatch patch show there was going to be a Capture the Flag mode included with the game at one time. No coding nor models show any trace of a CTF mode, so these images are likely the only remnants from it.
Contributed by DeerBoarDude
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In the Forsaken Compound, if you turn off the path near the end of the level, you will find a secret Duke Nukem skeleton hanging from a tree. When Sam approaches it, he will say, "Dude, you've been hanging here, like, FOREVER." This is a reference to the then unreleased Duke Nukem: Forever.
Contributed by gamemaster1991