Perk

In the SPECIAL character system, Perks are beneficial bonuses the player charecter picks up from experience.

Perk Rate is a Derived Statistic. It describes how often the character is allowed to pick a Perk. Character's Perk Rate depends on his race, traits, such as Skilled and Fear the Reaper, and some perks, like Divine Favor.

Racial Perk Rate for humans is 3, which means that they can pick a new Perk every 3 levels. The rate is 4 for ghouls, super mutants and deathclaws, and 2 for dogs. Robots cannot pick Perks at all.

In Lionheart, the first Perk is taken at Level 2, not 3, but the subsequent Perks are taken every 3 Levels.