Mecha zombie

The mecha zombie is a new fodder-class enemy introduced in Doom Eternal. Its appearance suggests heavy cybernetic modifications, notably on the right arm, which has been replaced with a combined energy gun and flamethrower from the elbow down. The mecha zombie's arms are unusually proportioned, with short biceps and longer forearms along with a metal claw on its left arm. Its skull is completely bare with glowing red eyes and cables connected to its back, and its intestines are exposed.

Tactical analysis
While it is equipped with an energy gun and a flamethrower to make it more dangerous at long range, the mecha zombie is not much more threatening than the standard zombie and can be slain just as easily.

Glory kills

 * The Doom Slayer grabs the zombie's weapon and puts it under their chin, forcing the zombie to kill itself.
 * The Slayer grabs the zombie's left arm and drives its claw through its head.
 * The Slayer kicks out the zombies legs and decapitates it with a swipe of the Doomblade.
 * The Slayer kicks the zombie in chest and then slices off its head
 * The Slayer hacks off the zombies legs and kicks it away
 * The Slayer grabs the Zombie by the head and crushes it's skull
 * Placing one hand on it's shoulder, the Slayer tears off the zombies head with the other
 * The Slayer sweeps the zombies legs out from under it and then cuts it in half at the waist
 * The Slayer drives the doomblade through the zombies head before kicking it off
 * The Slayer lands on the zombies chest and caves in it's entire skull with a stomp
 * The Slayer tackles the zombie to the ground and breaks it's neck.

Trivia

 * The mecha zombie is the only Doom Eternal monster in the base game to lack a codex entry.