The following is based on Fallout Tactics and some details might contradict canon.
The tank track robot was a utility robot used in agriculture before the Great War. After the War, it was adapted by the Calculator, the mad A.I. from Vault 0, for close range combat.
Characteristics[]
It attacks using its spinning flails which can deal a great bit of damage. Though highly resistant it can be easily defeated because it can't fit through most doorways, lacks a ranged attack, and takes time to spin up its flails, making it fairly easy to maneuver away from before it can do any damage.