The Gobots.
Released like, a month or something before the Transformers, and for a while was a strong contender until a bit into the first Series of G1.
If done right, it could be that contender again, the thing i liked about it was that there toy Transformations were EXACTLY the same as in the show, very simple (Pull the legs down, Pull the arms out, and flip the head, was the general transformation, then you had others which was basically flip the legs down and that's it.), however, this was also the toy line's biggest downfall. (And the names...Leader-1, Cy-Kill, Tank, Coptor, Dive Dive, Scooter (however he was the best out of them all), the list goes on.)
For anyone who doesn't know what The Gobots is...well...here.
Pretty much the same as Transformers, Good guys are called Guardians, bad guys are called Renegades. Who live on the Planet of Gobotron (sound familiar?) both factions are in the middle of a civil war, for some reason other than depletion of Energy (like in Transformers) a small force from each side travels to Earth, yada yada yada we have heard this. However the major difference is that they used to be Flesh creatures, like us, however there planet became cold, barren, and eventually (somehow) became metal. So the once called Gobotronians built huge Mechs and put (i think) there brains in said Mechs to survive and renamed themselves "Gobots"
I would LOVE to see a modern day version of these guys.
On a note, not seen this show since like forever, and i know this :') yeh im sad
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(I know this isn't a game, but it does say "Franchise" however a Gobot game would kinda cool >.>)