Just a short guide about an Easter Egg nobody speaks about.
In loving memory of “K. Katarn” – retconned
On Map 5-3 “Haskel´s House of Horrors” you can find the tomb of “Caleb” (the protagonist of the “Blood” series) and next to it you can spot this:
This is an obvious reference to “Kyle Katarn”, who was the protagonist of the “Dark Forces” – / “Jedi Knight” games and an important Star Wars character until Disney introduced the new canon and retconned him.