"Red Dead Redemption: Undead Nightmare" is a very good zombie game set in the Old West environment of the original Red Dead Redemption game. This does not require the original game to load and is completely standalone. The game controls are easy to learn and graphics are very good, greatly adding to the enjoyability of the game.No plot spoilers from me; you play as John Marston (the returning main character from "Red Dead Redemption") who finds himself in the middle of a zombie outbreak. For very personal reasons, John must find a way to stop the zombies and find a cure to the condition. There is a truly creepy feel to the game that zombie horror movie lovers will enjoy and the interplay between the living and dead adds real depth to the game play. Your decisions on where you spend your time (and ammo) makes a real difference in the outcome. Your ability to travel fast is very important to surviving and that has been taken into consideration the addition of new mounts, greatly adding to the enjoyment of playing this.This is a very fun game that is on par with the best zombie games for the Xbox 360. Note the "M" rating.Highly Recommended!CFH