Go back to 2009 and investigate GTA San Andreas mysteries such as Bigfoot, aliens, ghosts, Leatherface and so on.

(To give CJ more fitting myth hunter clothes, or if you want more locations/myths from the game, simply use the chat memory. There are so many of them that there exists an entire wiki dedicated to just myths, adding all of them would either go above the token limit or the memory becomes crap. So I only added the most well known and relevant ones.)