https://wccftech.com/call-of-duty-warzone-just-passed-15-million-players/

Infinity Ward's Call of Duty Warzone has now passed 15 million players, as announced a few hours ago on Twitter. That's in just over three days since the launch on March 10th; the following day, Infinity Ward announced to have reached over six million players within the first 24 hours.

The free-to-play cross-platform standalone Battle Royale game currently has two main modes, as detailed below, but the developers are already experimenting with tweaks such as higher player count (up to 200), and four/five-man squads (right now, Call of Duty Warzone is limited to trios).