Son of Agamemnon and Clytemnestra. After the murder of his father, he was ordered by Apollo to avenge his father's death. He did so, killing his mother and her lover, Aegisthus. For this act, he was pursued by the Erinyes, the goddesses of retribution. He wandered many years so tormented, accompanied by his sister Electra and friend Pylades. Finally, at Athens, the gods interceded and held court. Athena defended him and Apollo gave testimony. Orestes was exonerated and the Erinyes stopped pursuing him.
Orestes killed his own mother on the orders of Apollo.