https://www.pcgamer.com/call-of-duty-black-ops-4-beta-system-requirements-revealed/

With the first of two Call of Duty: Black Ops 4 open beta tests coming our way this weekend, Treyarch has posted the details about what we can expect, including when the action will begin—that's 10 am PT/1 pm ET on August 10 for those who have preordered, August 11 for everyone else—and what we'll need to make it rock.   

First things first, you're going to need a Battle.net account if you don't already have one, because Black Ops 4—much like Fallout 76—will not be on Steam. It's free, and yes, I know it's a hassle having to maintain multiple game launchers, but the world is changing, Steam is bleeding, and we might as well start getting used to it now. Besides, the odds are pretty good that you're already playing Overwatch, Hearthstone, and/or Destiny 2 (and thus have the Battle.net client installed) anyway.