The new mode, known as RedSec, will be free-to-play and does not require the purchase of the main game.
According to the Battlefield Twitter account, the mode will launch at 8:00 am Pacific time, and several changes have been made based on player feedback from testing.
Eyes up. Plates on. #REDSEC arrives tomorrow at 8:00 PT / 15:00 UTC
A reminder can be set for the launch.
Author's summary: Battlefield 6 gets free RedSec mode.