For nostalgia reason, if someone is used to play 50 Hertz. And off course for the language itself (text and voice). I grew up with the PAL version and to me the voices are iconic. So having NTSC and PAL versions is essential in a collection that calls itself "Master" in my opinion. And sometimes PAL games got released as last and may include bug fixes. Can't say for this particular game, but that is something to have in mind. I found these interesting investigations: