As we made known before, Hardhead is the repaint version of the Universe Onslaught.
In the toy listing, we can take a look on the front & back view of Hardhead toy box.
Thanks to Seibertron member jrgreer74, who helped to extract Hardhead's biography from the blurr image.
"HARDHEAD LIVES TO FIGHT- SO MUCH THAT LIFE WITHOUT A WAR ON SEEMS POINTLESS TO HIM. HE WOULD
BE THE PERFECT SOLDIER IF ONLY HE COULD JUST TAKE ORDERS. UNFORTUNATELY, HE'S TOO STUBBORN TO
FOLLOW ANY COMMAND HE DOESN'T AGREE WITH, AND TOO DENSE TO APPRECIATE THE SUBTLETY OF STRATEGY. WHY ENGAGE IN A FLANKING MANEUVER, HE REASONS, WHEN THERE'S PERFECTLY GOOD OPEN GROUND OVER WHICH TO MOUNT A CHARGE? MORE THAN A FEW BATTLES HAVE STARTED EARLY BECAUSE HE
COULDN'T WAIT FOR THE COMMANDERS TO MAKE THEIR PLANS, AND SIMPLY CHARGED IN, GUNS BLAZING."
It is also confirmed that this toy does not receive any retooling except the paint job.

