Master-D

Master-D is the true antagonist and final boss of Bionic Commando, once the leader of an extremist hegemonic group that threatened the peace among nations, the Badds. Though he's dead and the Badds group was dissolved, his beliefs were still influential and eventually lead to the creation of the Empire. To make matters worse, the head of the Empire, Generalissimo Killt, came across a Badds' top secret project for world domination, The Albatros, that was never finished called and decided to finish it himself.

It turns out that Killt cannot finish the project because ha lacks information that only Master-D knew and took to the grave so the Generalissimo is trying to resurrect him. In the final confrontation Radd Spencer comes across Killt who tells him that they had finished the Albatros, even without Master D so there's no need for him to revive. However just before dealing with Radd Master D comes back to life and the machine that was resurrecting him explodes, instantly killing Killt. Master-D takes control of the Albatros which was a powerful laser cannon ship and the final battle begins. After his defeat Master D attempts to escape in a helicopter but Radd stops him with a bazooka given to him by Hal, a dying comrade, Master-D finally meets his demise and his head explodes in one of the most infamous gory scenes in the NES era.

Trivia
His strong resemblance to Hitler is because Master D was actually Hitler in the original Japanese version. The Badds were, of course, the Nazis.