8. Duke Nukem Forever
Not just offensively bad, Duke Nukem Forever counts doubly here because of its offensive content, and the moronically gleeful way the game attempts to bring the player in on its joke. Yes, it's supposed to be tongue-in-cheek, but it's all so crass and all so cheap that the effect is dulled completely, and it becomes just another reason to hate the under-cooked awfulness of the game in general. The jokes are mysoginistic, puerile and childish, and the fascination with poo is just about as intelligent as it gets. It might have been marketed as an extreme shooter, and it's patently not for kids, but that doesn't mean it has to be so ridiculously cartoonish in its provocative content. http://youtu.be/NfaoJ80OvZY