Assassin's Creed Odyssey review in progress: This ancient adventure breathes new life into the series

I haven't finished Assassin's Creed: Odyssey ($60 on Humble), nor will I for a while. I've been playing it for days now, over 30 hours and counting. "Surely I must be closing in on the end," I keep thinking. Then I check the map and find I've explored less than half of it. Everywhere I go, there's more stuff.