Different attacks and other harmful effects deal different types of damage.

Acid: Exposure to any extremely acidic or caustic compound can cause acid damage, including exposure to highly alkaline substances such as lye.

Blunt: Bludgeoning attacks—hammers, falling, constriction, and the like—deal blunt damage.

Cold: Tissue damage caused by extreme cold, typically from the environment or from magical attacks.

Entropic: Entropic damage causes the rapid breakdown of structures, including flesh.

Fire: This sort of damage can be caused by flames, by extremely harsh light, or by direct application of heat.

Impaling: Puncturing and Piercing attacks, including spears and monsters' bites, deal impaling damage.

Kinetic: Kinetic is pure energy focused into a damaging form. Most effects that deal kinetic damage are spells.

Lightning: Any high-voltage source, either static or current electricity, can cause lightning damage.

Mental: Psychic abilities, fear effects and illusions deal mental damage.

Physical: This is a 'meta-type' of damage, that encompasses Blunt, Impaling, Kinetic and Slashing.

Poison: Venomous stings and toxic gas deal poison damage.

Slashing: Swords, axes, and monsters' claws deal slashing damage.

Thunder: A concussive burst of sound, such as the effect of a Thunderbolt spell, deals thunder damage.

Sometimes, damage will be listed as non-lethal. For example, some weapons are noted for inflicting non-lethal damage. Non-lethal damage cannot kill an opponent, but it can take them out of a fight easily enough.

Non-lethal damage is applied to stamina, but does not apply Injury. Any Injury that would be taken by the target instead inflicts one level of Slowed on the target per point of Injury that would have been applied. This Slowed condition automatically reduces one step at the end of each round.