In doing so, Treyarch has confirmed that the zombie mode will not be receiving a main quest until at least a month after the release of Call of Duty: Vanguard. The developer laid out the plans for the popular game mode on its website. Treyarch, the developer behind last year’s Black Ops Cold War, is handling the zombie portion of Vanguard. One unfortunate detail is that Vanguard’s zombie mode won’t have its main quest on release. Call of Duty: Vanguard is releasing later this week so details about the game are rolling in thick and fast.