Phazonmasher's The Caligula Effect review

What I want to know is, what does this game have to do with Caligula, one of the most twisted and infamous Roman emperors of all time?

You know, the game was just called Caligula in Japan, and I was wondering the same thing during my entire playthrough. It's never brought up once. I'm sure there's a Japanese interview somewhere about the name, but I honestly don't know.