Killing zombies — it's one of the most enjoyable things you can do in a game, and it usually involves massive amounts of enemies, blood, and gore. The latest zombie killing marathon to hit the Xbox 360 is Dead Rising ($60), and it sets a new bar for outrageous action. Trapped in a mall, you play as photojournalist Frank West and can use almost anything as a weapon to take on the large groups of the undead — think 20 or more — that assail you from all directions. Splattering zombies in HD? Sounds good to us.