Dungeon World: Exodus
Orcs were a berserker race originally abandoned in Wall when it fell. They were kept out of the flight to Exodus even while the humans made a pact to bring the goblins along.
Somehow, in the last hundred years, the orcs have reappeared and began to sack towns outside of Exodus. Little is known of them and few texts remain which mention orcs.
Current worshippers of Duunu like to distance their god’s orcish origin from the current threat.