2. Undead Nightmare DLC
Red Dead Redemption's DLC's were well-made but the 'Undead Nightmare' DLC was a favourite amongst gamers. Not only did it feature zombies, a gaming sub-genre that was really popular back then, but it featured an undead wild west. The ability to 'capture' towns from zombies while looking for a cure to the plague was a nice touch. A wild-western zombie game is extremely rare to find and Rockstar did very well by releasing this DLC.