get it from the playstation or xbox store
yes you do
No.
you dont unlock it. you have to buy the Legends and Killers DLC pack. then you have to buy them at manzanita post in singleplayer, and then you get them
No. Undead Nightmare standalone disc is the Undead Nightmare, Legends and Killers and Liars and Cheats packs (possibly Outlaws to the End too) + Multiplayer. There's a possibility your multiplayer lvl from RDR carries over when using the UN disc. I do not know as i have RDR and the UN download for Xbox but the UN disc for PS3
Yes they plan to release a number of them starting with Legends and Killers this August and later this fall a Undead nightmare pack. see related link
Yes You can but not in single player if you get the Multiplayer Legends And killers you can play as red dead revolver characters online. but not for singleplayer and lairs and cheats and undead nightmare give you zombies and redemption and damnation characters [people from the singleplayer story]
Well, you can get Undead Nightmare into the Red Dead Redemption disc if you download it from the PlayStation Store.
You need to go to Game Marketplace. Find Red Dead Redemption. Then there should be a DLC list.
Legally, no.
You can download Red Dead Redemption Undead Nightmare at the playstation store on the playstation network. It costs ten dollars.
Log on to Xbox Live. Scroll to the Games on Demand area of Games Marketplace and select Red Dead Redemption. Purchase or rent, whatever you wish. You'll download it automatically. There, you have downloaded Red Dead Redemption.
you need either the legends and killers dlc (in which you buy them in manzanita post) or the undead nightmare dlc (where you get them after saving or resaving manzanita post or from looting zombies however you have to loot about a million zombies to find them)