I was almost going to guess it was some stylized font for Katakana or (whatever it is Korea uses). But that soon went to a dead end.
ETA: Even in the game itself - there's weird lettering/font everywhere. But I'd wonder if there's a way to decipher it? Like does whichever symbol correspond to an actual (English or Japanese) letter/character?
Edit2, Re: decryption: Well obviously that's already been attempted.