Lockdown (Earth-1984)

Lockdown is a Decepticon mercenary who enjoys hunting his "prey" to get upgrades. He gets his name because of his ability to knock out electronics, primarily other Transformers, thanks to an electromagnetic pulse generator that he stole from the Autobots and implanting it in his arm.

Early Life
Lockdown was a gladiator in the arenas of Kaon. Unlike most other gladiators, however, he had deep respect for his opponents and easily killed those who were weak compared to him. He got the attention of another gladiator, Megatronus, who admired his respect for stronger opponents and asked him to join in his cause in taking over Cybertron.

The War
As a Decepticon, Lockdown stole weapons and armor upgrades of all his victims, attaching them into his body in order to upgrade himself. Overtime, he became a mercenary and led dangerous missions whenever he was paid to.

Trivia

 * Lockdown is similar to Deathstroke from DC Comics, as they are skilled mercenaries with respect for their targets.
 * As a gladiator of Kaon, his appearance was originally similar to his Animated counterpart.