US main timeline (includes G2 and Alignment according to Ask Vector Prime) UK main timeline Regeneration One timeline UK original future timeline (Galvatron I) Aspects of Evil timeline Earthforce timeline The timeline from which Galvatron I came to visit the Earthforce timeline (only mentioned) Earthforce Galvatron II timeline The timeline in which Galvatron I killed the present day Optimus and the rest of the Autobots during the Time Wars The timeline from which the above Galvatron came US Galvatron II timeline UK Galvatron II timeline Big Broadcast of 2006 timeline Classics timeline Shattered Glass timeline (I think this could be considered a Marvel timeline since I think it's supposed to be a Classics mirrorverse) UK text stories (they don't fit the main UK timeline. I think they might be one continuity) Another Time and Place timeline Transformers Comic-Magazin timeline Fleetway G2 timeline Regeneration 1 Galvatron timeline The timelines from which two mind-controlled Optimuses (alongside RG1 Optimus) came up to beat RG1 Rodimus up The timeline from which the Galvatron of the Classics timeline came Peace timeline There would be even more if you consider the timelines who were never seen nor mentioned and not even had characters from the said timeline show up but are implied to exist. For example, Another Time and Place probably had at least a version of Galvatron show up from the future. Are there any I've missed?
Possibly the timeline from Flashback! - Transformers Wiki where Megatron time travels to the past to take control of Snaptrap to guide the Seacons away from being killed by Underbase Starscream, but is stopped by Prowl. It’s unclear what future that is part of.
