The Transformers franchise has been rolling out since 1984, with Hasbro and Takara's robots in disguise taking many different forms over the years. The most popular of these characters include the likes of Autobot leader Optimus Prime, as well as several other different Cybertronians. Beyond the Autobots and Decepticons, however, there are several other groups of Transformers that more casual fans might be unaware of.
Source：https://www.cbr.com/transformers-autobots-decepticons-factions-explained/
