You are a Ghost This article is a codename or is conjecturally-titled. While it is canon, its exact name has not been identified.
Russian special forces Bodark used a large four-legged/wheeled drone. During the assault on Sokolov's base, the drone accompanied a force of troopers. Ghost Leader tried to fire his rocket launcher at it, but its gatling gun stopped the missiles. It then chased after 30K, but was rammed by an armored vehicle driven by the Ghost Leader. The drone fell into the ditch and was destroyed.
Based originally on real ‘Big Dog’ military hardware, it also went through several design changes, from having legs to wheels and the inclusion of a Gatling gun. Initial tests to work out the speed of the Warhound revealed that it didn’t quite look scary enough, so Mikros slowed its movement down to be more frightening and threatening.