Just go onto multiplayer and join a free roam session.
its on Undead Nightmare
You can't play coop on Red Dead Redemption or Undead Nightmare.
No, if you buy the one for 20 dollars that is undead nightmare but not the original. The only way to get both is buy the Original Red Dead Redemption and then buy the Undead Nightmare add-on
Well, you can get Undead Nightmare into the Red Dead Redemption disc if you download it from the PlayStation Store.
Yes you can play them on most game types but they will not be able to play undead overrun with you unless they have the undead nightmare game/dlc as well.
You cannot get Red Dead Redemption - Undead Nightmare on the PlayStation Portable.
I would say Undead Nightmare is a DLC because you die in The 1st Red Dead Redemption...
Only if you want to download the game, if you buy the undead nightmare disc the no you don't need the original red dead redemption.
You can download Red Dead Redemption Undead Nightmare at the playstation store on the playstation network. It costs ten dollars.
No you cannot join with the zombies in undead nightmare
For the game of the year edition you get both the original Red Dead Redemption, and undead nightmare.
You have to get in a fight with them.