The Wilderness Berserkers were a tribe of Wilderness-dwelling people referenced in the first RuneScape novel, Betrayal at Falador. The Berserkers were recruited by Lord Sulla as aid during the Siege of Falador. It seems possible that the Berserker tribe was completely annihilated during the battle.
The Berserkers were an extremely primitive race, filing their nails and teeth to fine points and fighting unarmed. When attacking, they would leap upon their victims, tearing out their throats and eyes using only their claws and teeth.