World War Z 999 Level Direct

What is 999? It's when humanity doesn't lose to the virus. It's when humanity loses to each other .

My squad is dead. My ears are ringing. And I just realized… the game was counting UP. World War Z 999 Level

It starts like a normal round. Then the sirens wail. Then the ground vibrates . Then you see it: a solid wall of Zeke moving at highway speed, stacked 50 bodies high. What is 999