Call of Duty: Black Ops 4 Double XP Happening Now as Part of “115 Day” Posted on 16 January 2020 by Nevesar Call of Duty: Black Ops 4 Double XP Happening Now as Part of "115 Day" Treyarch is hosting a Black Ops 4 double XP event as part of "115 Day!" There's also one more Zombies Easter egg yet to be discovered and here's a clue. MP1st
