Usually not the children of gods. E.g. Oedipus, Antigone, Agamemnon, Achilles, Odysseus, Orestes. E.g. son of a god. E.g. Killing a monster. Often involves a journey to a strange land.
Hero often has supernatural or divine help.
Argive plain major area of Mycenaean civilization. Argos destroyed Mycenae and Tiryns in 5th century B.C. and appropriated their myths. The bronze chamber. The shower of gold. Medusa the Gorgon.