How To Access The Warzone Mode In Gears of War: Judgement

How do you find the Warzone mode in Gears of War: Judgement?
Warzone mode in gof judgement thumbnailIt's really pretty simple. After you have booted the game, follow these steps...
1. Choose Private Match. Highlight Team Death Match and press A.
2. You will get a prompt. Press A and B at the same time.
3. You will see "You are about to start a match. Continue?" You should press A.
4. Enjoy the game.

How did this happen?
Read here: Gears of War Judgement Accidentally Has An Extra Game Mode