I was thinking more along the lines of Generation 1 but this image also works.
Essentially, the concept is Transformers meets Dungeons & Dragons. The robots from notCybertron landed on some colony world but then a "plasma storm" or some such destroyed their infrastructure. Nonsentient drones evolved into robotic prey; some of the sentient robots were mutated into horrible biomechanical mutants. Instead of Halflings, Humans, and Dwarves there are Minibots (change into small cars, scouts/stealthy), Chargers (change into sportscars, balanced), and Convoys (change into trucks, leadership/support). Instead of alignments I could have factions.
I originally thought about hacking Basic D&D for this; but reading Dungeon World has piqued my interest in Powered by The Apocalypse as an engine, although the specific "Transformers + D&D" idea I have probably wouldn't work as well under it. I still need to refine this concept.