Aamon is the first boss in Painkiller: Resurrection. He is one of the Astaroth's servants and one of his great warriors as Astaroth says. He appears at the end of the Forbidden Valley where the giant locked door is. He uses the first version of the Beast's model but its size and damage is greatly increased. He possesses the same abilities as the little beasts but the rolling one is way more slower comparing to its size.
In demonology he also governs 40 Legions of Hell as Astaroth and he is proclaimed to be a Marquis of Hell.