Unity was the best in my opinion. Origins, Odyssey, and Valhalla are all the new design of Assassin's Creed games that earned their own set of fans, but they're so different from what came before with their faux RPG design. The fantasy is broken for me when I sneak up behind someone, stab them in the neck, and their health bar only goes down a little bit.

The first Assassin's Creed game was very repetitive, but they gave you small assassination missions for you to figure out how to get, kill your target, and get out. The next several games in the series were better in every way except for perhaps these missions that mattered most, which they made extremely linear and scripted action missions.

Unity (set in Paris in the late 1700s) was an answer to those frustrations. There was a point in the dialogue where they specifically called it out. "So what's the plan?" "The plan? Come up with your own plan. I'm not here to hold your hand." They gave you expansive areas to carry out your mission, and you could find your own way in, kill your target, and get out. The game has some of its own baggage, like the loot system taking any challenge out of the combat later in the game, when the whole idea was that you were squishy that you should avoid combat, but it delivered on the experience the best since the first game.

Then Syndicate came out next, and they highlighted different ways to do your assassination like you were a big dummy, and they made a significant part of the game about street brawling, so I gave it a hard pass. The next game in the series was Origins, which brings us to the modern faux RPG era.