What Dreams May Come in the book are derived from my wide range of reading." One of Matheson's influences was Harold W. Percival, an adherent of Theosophy, a belief system with a strong Eastern and Hindu influence. The story also shares the same theme of the ancient Greek myth Orpheus and Eurydice, in which the gifted musician makes a challenging journey to Hell to retrieve his wife. One character quotes from the writings of 18th century Christian mystic Emanuel Swedenborg. Matheson bases his descriptions of the death experience itself on studies by Elisabeth Kübler-Ross and Raymond Moody. When reading these accounts, Matheson found that
The Battle of Olympus crystals help to provide offensive power and defensive strength for the player. Three fragments of love are there to remind Orpheus of his girlfriend Helene. Hades rules his dominion in Tartarus, where his strongest minions live alongside him. During his adventure, Orpheus needs to meet the Greek gods and gain their favor, starting with Zeus, the leader of the Olympian gods, who encourages the other gods to grant Orpheus powers. These powers are in the form of a weapon, a shield, and other special equipment, among them a harp, which summons Pegasus to carry Orpheus to far locations. As the