Grand theft auto 4 the latest one? Lots of swearing, missions where you have to steal cars, beat/stab/shoot people, make collections of drugs or money and go on dates with women and try to get invited back into hers, you don't see it but the task and sound is there. Visually the game isn't as violent/gory as others in terms of what you do its just the content and what you're doing, mentally, IE its asking you do kill someone for money or steal cars etc. I think it should be 18 though.

I OWNED predator on video as a kid of 11 never did me any harm and arms get ripped off in that and people skinned. Depends on him as you know him best and as some have said he will know all the swear words from school. Why not but it, play it and judge yourself, can always take it back or sell it.