After an extended period of downtime, the original Call of Duty: Warzone has re-launched today, November 28. Servers for the game–now called Warzone Caldera–should be back online now.
Activision’s online services website states that online services for all Warzone Caldera platforms are now up and running. As usual, your own mileage may vary. Separately, the ESRB recently assigned Warzone Caldera a rating–M for Mature–for the game’s re-launch this week.

Activision pulled Warzone down on November 16, the day that Warzone 2.0 was released, and kept the game offline for a total of 12 days. The developer stated this hiatus was to ensure the newer game, Warzone 2.0, had a smooth launch and to give its workers time off for Thanksgiving.