Odyssey, c.1600, from Latin Odyssea, from Gk. Odysseia. A Homeric epic poem of ancient Greece, relating the 10-year wanderings of Odysseus (Latin: Ulysses), king of Ithaca, after the Trojan War. Also, in the figurative sense, a long, adventurous journey. The adjective form, rarely seen, is Odyssean. The first recorded instance of the figurative usage was in 1889 - coincidentally, the year chosen for the Victorian science fiction roleplaying game Space: 1889.
"What a long, strange trip it's been." - Jerry Garcia, The Grateful Dead