I need some good games for xbox 360?

I have already beat the ones I have so I need some new ones. I already have my xbl games now I need some to play when I don't feel like playing live. I like games with storylines and missions. And I really like zombie and mafia type games. The 3 I have played and enjoyed were red dead redemption undead nightmare, mafia 2, and resident evil. Can you please suggest some games similiar to those? Oh and no assasins creed! I hate that game passionatley. Its too slow and boring for me. Thanks in advance!!