Question: red dead redemption undead nightmare does it include original game

Answer: No, Red Dead Redemption: Undead Nightmare is a standalone expansion pack to the 2010 video game Red Dead Redemption. It adds a zombie horror-themed single-player campaign, two multiplayer modes, and cosmetic additions to the environments and characters of the open world Western action-adventure game. The alternate timeline story follows the returning protagonist and former outlaw John Marston as he seeks to find the cause and cure for a zombie plague that has infected his wife and son. Marston liberates towns overrun by the undead and assists other non-playable characters with quests along the way.