The Grand Alliance: Destruction unites factions that follow the will of Gorkamorka—the god of brute force and cunning. Their goal is to smash civilization and return the Mortal Realms to their wildest natural state, where only the strongest survive.

The armies of Destruction include the Orruk Warclans (Ironjawz, Kruleboyz, Bonesplitterz), Gloomspite Gitz (grots, squigs, troggoths), Ogor Mawtribes (the perpetually hungry ogors), and the Sons of Behemat (gargants). They are bound by a passion for looting, hunting, and conquering—often just for the sheer joy of the fight.

Waaagh! is a magical and elemental force that drives their excursions; it can begin with a petty squabble and grow into a rampage across the realms. In the Era of the Beast, many tribes unite into a Big Waaagh! and follow ancient titans, such as Kragnos, on a path of destruction.

The belief in Gorkamorka takes many forms: ogors worship him as the Gulping God, Firebelly shamans as the Sun-eater, and Bonesplitterz as the Ultimate Predator. Whatever mask he wears, they all believe that might makes right.