This article is a stub. You can help Assassin's Creed Wiki by expanding it. A view of the valley Istion Valley is a valley which constitutes the westernmost region of Achaia in Peloponnese, Greece. During the Peloponnesian War, the region was explored by the Spartan misthios Kassandra. Appearances Assassin's Creed: Odyssey References ↑ Assassin's Creed: Odyssey Retrieved from "https://assassinscreed.fandom.com/wiki/Istion_Valley?oldid=815552" Categories: Article stubs Locations in Achaia Regions of Achaia Valleys Community content is available under CC-BY-SA unless otherwise noted.