Treyarch's Zombies mode features three main stories: the Aether Story, the Dark Aether Saga, and the Chaos Story.
Aether Story[]
- Main article: Zombies (Treyarch)/Story/Aether Story
Introduced in Call of Duty: World at War and also featured in Call of Duty: Black Ops, Call of Duty: Black Ops II, Call of Duty: Black Ops III and Call of Duty: Black Ops 4. The Aether Story heavily features time travel, parallel timelines and multiverse elements.
Dark Aether Saga[]
- Main article: Zombies (Treyarch)/Story/Dark Aether Saga
Introduced in Call of Duty: Black Ops Cold War and also featured in Call of Duty: Vanguard, Call of Duty: Modern Warfare III and Call of Duty: Black Ops 6. The Dark Aether Saga is a follow-up to the Aether Story, taking place in a single world with a more grounded theme.
Chaos Story[]
- Main article: Zombies (Treyarch)/Story/Chaos Story
Featured in Call of Duty: Black Ops 4. Set in 1912, the Chaos Story features more fantasy elements with mythological themes.