Scourgers

These bipedal Ravagers were released throughout the planet at the outbreak of war.
The tip of their arms contain a massive claw with a high-temperature pulse laser.
Their chest is equipped with a beam cannon that produces a discharge powerful enough to instantly obliterate a high-rise building, which has resulted in numerous cities being wiped out in a single night.

No one knows for certain why it has a humanoid shape despite being extraterrestrial in origin; some believe it is to instill fear into humans, while others say it was designed to adapt to the Earth's gravity.
Its armoring is vastly stronger than the exoskeletons of the Giant Creatures, and when war first began, standard weapons could not damage it.
The first successful destruction of a Scourger occurred in 2032, after PA-Gear and PA-Gear weaponry were developed.
As of 2040, most Scourgers have ceased functioning.
However, they reboot when a human is detected nearby, continuing destruction until everything around it has stopped moving.