The Ar Tonelico series features a mechanic in which the main character dives into the psyche of his female companions, unlocking powers by travelling deeper into their subconscious. Developer Gust takes advantage of this feature to make incredibly dirty puns.
Ar Tonelico III was rated teen in Japan. The ESRB isn’t being as kind, slapping on a mature rating on the PlayStation 3 RPG for, among other things, a male character reaching inside a female character’s body while she moans.
No surprise BioShock 2 picked up an M from the ESRB, but that’s not to say its newly minted rating certificate isn’t interesting. The writeup says we can expect F-bombs, mother F-bombs, the C-word and the past tense of “tweeta”.