If you ask me, the M rating is quite deserved here. I noticed way more adult language and sexual references than Persona 3 had. Some would argue that *Gun to head* makes Persona 3 the more "mature" game, but it was just darker, really. Maybe I'm just really desensitized, I don't know. Something about the constant S-bombs and some of the images and dialogue of P4 stand out as more M rated material to me. I mean damn, a boss that looks like a giant floating fetus with Harlequin Ichthyosis is pretty messed up to begin with. I'm surprised I didn't have NIGHTMARES after that fight.