Types of timelines in the multiverse

For a list of timelines, click here.
Sibling Universe: A timeline that shares multiple similarities with another. Example: Ghosts timeline and the Extinction/IW zombies timeline.

Unique Universe: A timeline that is completely unique and shares no similarities with other universes. Example: The WWII Multiplayer Timeline is heavily different from most other timelines.

Cut Universe: A timeline that's game was cancelled. Example: Call of Duty: Roman Wars was cancelled and so it is not canon to the Call of Duty timeline.