Perks

Perks are additional resistances and abilities gained by doing various things in game. You can increase perks by eating, drinking, gaining radiation, fighting and crafting supplies.

Hunger
Consumes less food per day. Food consumption required reduced per level.

XP is gained every time you eat Mutated Food or Rotten Food, but not Canned Food or other types of food, like bread or chips.

Thirst
Consumes less water per day. Water consumption required reduced per level.

XP only gained when drinking Dirty Water, but not Clean Water.

Radiation
Decreases chance of gaining radiation. Reduction in percent chance of gaining radiation per level.

XP increased by current radiation every hour ,e.g. a 30 rads wanderer gets 30 XP/hr (720 XP/day), but a 1 rads wanderer only gets 1 XP/hr (24 XP/day.)

Critical Hits
Increased chance of critical hits in combat. Percent chance for critical hits increased per level.

XP gained by fighting and gaining critical hits in combat.

Durability
Increases item durability. Durability of all items increases by a factor of 5 per level.

XP increased by crafting any item using different crafting tables.