Can someone reccomend an Xbox 360 game that is a casual epic multiplayer?

The kind of game that whilst accessible also has a lot of depth, so you can dip OR dive into it. A game that has single player, but also multiplayer, that works on split screen. Not Halo 3, more a replacement for Halo 3 in my life.Can someone reccomend an Xbox 360 game that is a casual epic multiplayer?call of dudy: any of them