SPR-TNK is a Hyperion robot created by Patricia Tannis. She created this machine to be used at the The Raid on Digistruct Peak training ground for the Crimson Raiders. The SPR-TNK has a loader torso and has massive incendiary autocannons for arms similar to the WAR Loader.
The SPR-TNK torso can be shot off like limbs on other loaders and also counts as an enemy, so when downed the torso can be destroyed to get a second wind.