Genius Bonus: The weird, creepy language of the cultists, Domus Durbentia, is actually a mixture of Latin and Sanskrit words and grammar.
Memetic Mutation: "CRUDUX CRUO!"/"MARANA PALLEX!"/"MARANAX INFIRMUX!"Explanation The Cabal cultist's Black Speech upon spotting and/or attacking Caleb. Also, it translates to "Fresh blood!", "Die weakling!" and "Death to the outsider!" respectively.
The cultists, when killed and/or set on fire. Their nonstop, high-pitched Black Speech is unbelievably grating, but their shrill, undignified shrieking and character-breaking English shouts of "It burns, it burns!" more than makes up for it.
Caleb's five variations of Evil Laugh when you blow something up, going from quiet chuckles to full-on psychotic cackling.
Trans Audience Interpretation: Gabriella is initially presented as a male character (Gabriel), then resurrected in a female body in the second game. The thing is, she seems to genuinely identify as female, showing no discomfort in her new form and getting annoyed when Caleb calls her "Gabriel" a second time in The Nightmare Levels; in Gabby's own words, "it's a long story". Her being a trans woman is generally accepted as the simplest explanation for all this.