A version of the Warzone game mode has been discovered in Gears of War: Judgment, with players able to access it via a series of button presses from the main menu.
Warzone was a mode in all three Gears games, but was left out of Judgment. To access it simply boot up the game and then select Private Match from the main menu. Highlight Team Death Match and then press A. At the next prompt press A and B simultaneously and then when it says “You are about to start a match. Continue?” press A one more time.
This discovery has led many to believe that Warzone will be added as DLC in the future, but one Epic Games employee has said that this is simply left over code from Gears of War 3.
— Peter Knepley (@PeteNub) March 26, 2013