Hunting will be the skill that allows players to track down rare NPCs; these 'Rare' NPCs will have slightly better loot than normal NPCs, and will give out more experience. However, they will be tougher than regular NPCs.
Rare NPCs will have a different Icon above their head so they are identifiable. The player also has a small chance of hunting a Mini Boss.
How it works
Killing a rare NPC will give a large chunk of exp towards this skill. A higher skill allows hunting of higher levelled NPCs.