Wasn't there some court ruling recently saying that games fell under the whole 1st amendment of the constitution and had the same rights as movies with adult ratings and couldn't be censored? I think I recall something like that.
anyways, I haven't played witcher 2 more than 5 minutes but I'll say to date, God of war 3 was pretty raunchy with the whole lesbian sex scene and tons of gore but I didn't really mind. Gutting a minotaur was just plain awesome I must say though
Oh and the whole ripping Apollo's head off scene