Splitscreen, unfortunately no. However you can play with a lot of players in different modes over Xbox Live or the PlayStation Network.
No
yes, you can have up to 4 players offline
no it is on online mode
Go through the story mode and eventually you will unlock it.
yes can but one of you has to be the zombie.
you cant. until dlc comes out.
You can't play coop on Red Dead Redemption or Undead Nightmare.
you can find it when u save gaptooth breetch.
its on 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
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.
Well, you can get Undead Nightmare into the Red Dead Redemption disc if you download it from the PlayStation Store.