Call of Duty Zombies works best when fans have some time to miss it, returning every few years alongside each Treyarch game. Having a Zombies mode for every Call of Duty game can not only put too much pressure on the developers, like with Vanguard, but it also leads to an over-saturation of Zombies content.
It first appeared in Call of Duty: World at War and became highly popular upon the game's release, resulting in the mode returning in Call of Duty: Black Ops, Call of Duty: Black Ops II, Call of Duty: Black Ops III, Call of Duty: Black Ops 4, Call of Duty: Black Ops Cold War, Call of Duty: Vanguard, and Call of Duty: ...
Unlike the rest of Call of Duty: World at War, the zombie mode is survival horror. After you've played through the single-player game, have waited till the end of its credits, and played a round of it, you'll be able to do so as many times as you'd like.
Final Fronts differs significantly from the main versions of the game. It features no multiplayer options, instead focusing on a three-part campaign mode, split up into 13 missions, set near the end of World War II.