AC Odyssey is easily the biggest and the most beautiful game of the series. When I first bought it, I was expecting a copy-paste of the Origins formula. But, Odyssey is a massive upgrade over Origins. Greece is so stunning that you'll never get bored of exploring it. The world-building, gameplay and story all have been improved upon.
One issue I find is that the game is too grindy. I hope they tone down this aspect in AC Valhalla.

AC Odyssey is easily the biggest and the most beautiful game of the series. When I first bought it, I was expecting a copy-paste of the Origins formula. But, Odyssey is a massive upgrade over Origins. Greece is so stunning that you'll never get bored of exploring it. The world-building, gameplay and story all have been improved upon. One issue I find is that the game is too grindy. I hope they tone down this aspect in AC Valhalla.