The Tyran Cluster is the main universe in the multiverse.
There is at least one distinct splinter timeline, named Decepticonia, branching from the events of the prime universe.
In-universe, the prime continuities are collectively referred to as "Tyran" in the TransTechs' universal stream designators.
Main continuity[]
This continuity encompasses all events of the main universe of BIONICLE, Transformers, etc.
Decepticonia[]
This takes place in a splinter timeline where Megatron won the battle of Mission City.