[sodacat]

The MPAA's ratings are crazy and don't make the least bit of sense. Back in the beginning it was plenty sensible. G was OK for anyone to watch, PG is either for adults, or for teens that adults trust to understand the material, and R is porn. Then everything went to hell when they threw in PG-13. G became toy commercials, PG is for sexless chick-flicks, PG-13 is for most movies, except for those that cross an arbitrary amount of objectionable material, in which case they become R. Or NC-17 if they decide to show an erect penis or a female orgasm, although flaccid penises and male orgasms can be slotted into lower ratings.

Games are so much easier to decrypt. Imagine every game starting as E. If it has violence against humanoid targets and it's Teen. Blood and violence or explicit sexual situations and it's M (although it's way more of the first than the second). Violence against cartoon figures might bump it up to E10 (a silly rating, honestly, but I can kind of understand it). If a game is only edutainment it gets hit with EC to prevent six year olds from accidentally asking for it. AO only exists to prevent pornographic games from being made and sold in the mass market (pity).