Supercreep

Supercreep is the leader of the alien hordes and wants to destroy all humanity. When he talks, he looks like a normal red alien with the exception of his yellow eyes.

In Radiant, his picture shows that he might be an alien with yellow eyes, two 'horns' or ears, two arms and a pair of feet. But in Radiant Defense, he looks like a yellow-eyed 'octopus' sitting on the Pyramid of Power. This might suggest that his 'horns' or ears, arms and feet in his Radiant picture might be his tentacles.

He appears in Radiant as one of the bosses, and he fights with Max Blaster using some sort of spaceship. It is obvious when you see a GIANT RED SPACESHIP with yellow eyes and all the weapons of the basic bosses in the Invasion except for the plasma gun of the hunters and the psychic energy balls of the psychic commanders. I suggest you use plasma gun or smart gun as homing rockets will hit his armor and most likely not his weapons.