Driven by the thrill of the chase, Lockdown is a bounty hunter by choice and a Decepticon only by necessity. He's got no real loyalty towards Megatron , but the Decepticons always pay on time, better than the Elite Guard, and allow him access to the systems upgrades he craves. Besides that, he's such a nasty piece of work that it's just easier for him to be a 'Con.
Lockdown has a grisly habit of collecting "trophies" from his victims for his own use. He has attached a number of parts that appear to be stolen, such as his hook, chainsaw weapons, and parts of his left leg. His collection of stolen gadgets include quick-hardening cement spray, smoke bombs, and Ratchet's EMP generator. The Autobots consider his actions appalling, while Lugnut views his mercenary ways an insult to the Decepticon cause, but Lockdown doesn't care. As long as Megatron and the Decepticon leadership will give him his upgrades, Lockdown will get the job done.
His alt-mode is a Muscle Car.