19 February 2021, 8:20 am EST By Activision accidentally leaked the upcoming "Call of Duty: Outbreak," a new open-world zombies mode of the popular shooting game. This is an unusual situation since unnamed sources or anonymous industry insiders are commonly the ones who reveal it whenever the game will have an update, a new mode, and more. (Photo : Screenshot from Twitter post of @TheGamingRevo3) Activision Leaks New 'Call of Duty' Open-World Zombies Mode! What You Need to Know About 'Outbreak' BREAKING: The new Cold War Zombies Outbreak mode was just accidentally confirmed on Call of Duty's website! Trailer soon! #BlackOpsColdWar#coldwarzombiespic.twitter.com/5rIA7fU1GX— TheGamingRevolution (@TheGamingRevo3) February 18, 2021