The title is updated for Xbox Series X for free, as long as you have the game on Xbox One
Interactive Saber announced the launch of World War Z: Aftermath for PlayStation 5 and Xbox Series,
Likewise, the developer communicated that people who already have a version of World War Z: Aftermath on PlayStation 4 and Xbox One will be able to access the PlayStation 5 and Xbox Series versions for free.
On the other hand, the “Horde XL Mode” will be exclusive to PlayStation 5, Xbox Series and PC. This will use the same rules and mechanics as “Horde Mode”; only that instead of being normal waves, they will be “XL” waves of 1,000 zombies.
The free content update arriving on January 24 will not only introduce the aforementioned mode, but will also bring new weapons and a new progression system for them.
You can see the new mode in action in the video below: