What's a fun 2 player game for xbox 360?

When I was younger I used to have fun playing 2 player games with my little sister and now I have an xbox 360 but don't know what games are fun. We like games like ratchet and clank style format. You know a game where we can run around freely and don't have to be tethered and the games like gta where theres so many possibilities to do. Also if we can do the story mode together that would be nice and also the to have a decent amount of vehicles and weapons. And when I say 2 player I mean as In another person in the same room playing the game with me. Thx you some much