Attack Resolutions (Attack Outcomes) in Pillars of Eternity ("Project Eternity")
All attacks in Pillars of Eternity compare the attacker's Accuracy value to one of four defenses: Deflection (direct melee and ranged attacks), Fortitude (body system attacks like poison and disease), Reflex (area of effect damage attacks), and Will (mental attacks).
A number between 1 and 100 is generated and added to the difference between Accuracy and defense to determine the attack results. Less than or equal to 15 = Miss, 16-50 = Graze, 51-100 = Hit, greater than 100 = Crit.
In a balanced Attack and defense scenario, the majority of attacks wind up being Hits or Grazes. When Accuracy is superior to defense, more Crits are likely. When defense is superior to Accuracy, more Misses are likely.