Damage types, resistances and invulnerabilities
Damage is split into various types that may or may not be unrelated to each other, providing the basics of damage type resistance and immunity/invulnerability.
The first video game about Damage types, resistances and invulnerabilities was released in 1985.
This makes some sense with fire, electricity and so forth and especially with protective wear that nullifies their effects up to a point.
Existence of damage types usually implies on the existence of varied resistances and immunities to the various damage types, a point many magic users especially get to deal with if there are such.