https://www.polygon.com/2018/9/11/17845762/call-of-duty-blackout-zombies-mode-mystery-box

Call of Duty: Black Ops 4’s Blackout mode has barely been in beta for a day, and we’re already unraveling a few of its mysteries. While there’s plenty to like about the marriage of Call of Duty and battle royale on the surface, it’s the stranger Call of Duty mechanics that make up Blackout mode’s best surprises — for instance, when a piece of Call of Duty’s popular Zombies mode makes its way into Blackout.

If you aren’t sure what I’m talking about, even though you’ve played the beta, don’t worry; it’s easy to miss. But, nestled into the standard battle royale mechanics are a few zombies that might surprise you. If you make it past. them, however, you can find a mystery box full of rewards. So, here’s everything you need to know to about Blackout mode’s mystery boxes.