While Nacht Der Untoten was basic, barebones survival, Verrukt introduced players to perk machines and an easter egg song with vocals. With each map, Treyarch came closer and closer to modernizing the mode. The start of everything, Call of Duty: World at War saw Zombies grow from a one-off survival experience into something more. RELATED: How Call of Duty: Black Ops Cold War's Firebase Z Easter Egg Compares to Past Games While main quest and side quest easter eggs have become more fleshed out and plentiful in the newer entries, Call of Duty: World at War and Call of Duty: Black Ops boast some important pieces of the mode's easter egg history as well. With systems like perks, Pack-A-Punch, and Wonder Weapons already in place from the previous Zombies entry, Treyarch was able to deliver a strong core gameplay loop from the beginning.Īside from adding new features and challenges to make each map unique, the original Black Ops game also made easter eggs a focus. With two maps at launch and several DLC maps released, there was plenty of content for fans to enjoy, and Treyarch had created a strong foundation to build upon. Though those that made the mode did not expect it to go anywhere, as many believed a Zombies mode in a serious FPS franchise like CoD would be received poorly, the opposite happened.Ĭall of Duty: World at War's bonus mode became a surprise success, and in response, it was expanded upon with Call of Duty: Black Ops. A bonus mode that went unmentioned up until release, Zombies was created by a small group of developers just having fun, and the little survival mode became so enjoyable to Treyarch that it was included as a bonus easter egg unlocked after Call of Duty: World at War’s campaign was completed. Back in 2008, players were introduced to Call of Duty Zombies inside Treyarch’s Call of Duty: World at War.

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