Most of the games don't have any nudity, and those that do it is so brief or just suggested nudity. If you have a problem with that type of thing the easiest thing to do is just go by the mature ratings for the game.
i thought god of war 3 has nudity
Depends. And I'm pretty sure there is hardly any games with nudity in it. The only one that I played that had nudity was Heavy Rain, but that game was amazing. Would recommend it even though it has brief nudity.
how about sexual stuff can you block that and nudity