Gathered Intelligence on this Subject:

The enormous gates of Hvalkatar inspire a sense of foreboding and dread in those who have the misfortune to gaze upon its rusted face. Perched atop its various walls, and hiding within its armored shadows, are the soldiers known as T.U.5.C.C. Sentries.

Armed with long range rifles and possessing the lethal close-quarters combat skills necessary to stop any soul unlucky enough to make it through the gunfire, these sentries are not to be crossed.