All characters finish the tutorial at level 2. Characters gain 5 hit points each time they level up, but this can be improved by as much as half if a character maxes out his or her Strength and Endurance attributes.
Players can heal one another and themselves in several ways. They can use First Aid Skills, like Stanch Wound and Heal Poison, to restore hit points and remove deleterious effects. These special abilities consume a quantity of stamina each time they’re used. Characters can also use medical items created by crafters in a similar fashion. Finally, Healing Mutations can relieve wounds and damaging effects, though using mutations costs the healer Gamma (and sometimes hit points) for the effort. Healing effects are stackable, so healers are free to combine any of these methods in order to keep a teammate (or themselves) alive.