https://www.gamespot.com/articles/call-of-duty-black-ops-4-blackout-beta-is-live-on-/1100-6461783/

PS4 players got to check out Call of Duty: Black Ops 4's private Blackout beta earlier this week, but it's now available for Xbox One and PC players who have pre-ordered the game. The beta went live September 14 and will last until September 17. A PC open beta is scheduled to begin September 15, giving players a chance to play without having to pre-order.

Blackout is the series' first battle royale-like mode, in which a large number of players drop onto a map, search for gear, and try to be the last one standing as the playable area shrinks, ushering everyone closer together (and making them more likely to get into firefights). Unlike similar modes in Fortnite and PUBG, Blackout contains many elements found in previous Call of Duty games, including zombies and returning Black Ops characters.