You read the headline. Grab yourself some Double XP, zombie hunters.
— Infinity Ward (@InfinityWard) November 11, 2016
If you pre-ordered any edition of Infinite Warfare, the zombies experience came with the game, so you're good to go.
Zombies in Spaceland is the survival co-op mode announced along with Call of Duty: Infinite Warfare back in August. It takes place at a 1980s space-themed Amusement Park which is overrun with the living dead - and looks like neon hell.
The mode stars actors Seth Green, Ike Barinholtz, Jay Pharoah, Sasheer Zamata, David Hasselhoff and Paul Reubens.
To give you an idea of what you're in for, if you haven't played it already, have a look at this 20 minute gameplay video.
Call of Duty: Infinite Warfare was released last week on PC, PlayStation 4 and Xbox One.