"Someone stupid at MS is probably equating the PEGI 18 rating with the AO rating in the US"

[HappySqurriel]

I could be wrong but to me this sounds like a problem with the PEGI rating system ...

From what I can tell the ESRB created ratings that were based on movie ratings and Mature is (roughly) the same as R-rated, and AO is (roughly) the same as NC-17. The problem is that PEGI doesn't have an equivalent rating which is a massive mistake.