Insignia

One of the universals across all Transformers continuities has been the use of faction symbols to differentiate members of respective armies, and sometimes even sub-factions within armies.

Generation 1

Ancient Transformer

(This is a symbol that Shockwave adopted in the G1 Dreamwave comic book. Although Transformers have been split into two races, they are one species, he claims.)

Autobot

(In G1 Comic continuity the Autobot symbol was based on the face of the Last Autobot. In the G1 Cartoon it was derived from the Quintesson slave brand)

Autobot (ancient)

Autobot (War Within)

Decepticon

(In "Real World" terms it seems likely that Hasbro designers based the Decepticon symbol on the head of Soundwave's toy. In the G1 cartoon the usual 3D detailing of the symbol was interpreted as a third spike in the center of the crest.)

Decepticon (ancient)

Decepticon (War Within)

EDC

(cartoon)

(Dreamwave)

Optimus

Malignus

Quintesson

Ultracon

(Used by Ratbat's group in The War Within era)

Wreckers

G.I. Joe Crossovers

Cobra

Cobra/Decepticon

G.I. Joe

Generation 2

Autobot

(The G2 Autobot symbol seems clearly based on Optimus Prime. In the Marvel Comics continuity this change may have occured since the Last Autobot had come and gone.)

File:Auto-g2.png

Cybertron Alliance

File:Cybertron-federation.png

Cybertronian

(This symbol was used by Jhiaxus's Cybertronian Empire, who considered themselves neither Autobot nor Decepticon.)

Decepticon

(The G2 Decepticon symbol seems to be a stylized, updated G1 Decepticon symbol. Bludgeon's Decepticons adopted this symbol around 1991, apparently unaware it was also being used by the Cybertronian Empire that they would soon encoutner.)

Beast Era

Arachnoid
Autobot (Transtech)

Blentron

File:Blendtron symbol.png

Decepticon (Transtech)
Dinobot

Maximal

Maximal (Beast Machines)

Moon

Mutant

Predacon

Predacon (G1)

(From IDW's Beast Wars comic books)

Predacon (Timelines)

(Worn by Razorclaw in Dawn of Future's Past.)

Seacon Space Pirate
Vehicon

Robots in Disguise

Decepticon

(Takara's Scourge toy, a redeco of G2 Laser Optimus Prime, kept Optimus' molded-in G2 Autobot symbols. Takara used that symbol, albeit upside-down, to represent the Decepticons. The Hasbro version removed them, and used the traditional Decepticon symbol. The cartoon, having been created for the Takara line, uses this symbol.)