8. Additional Objectives That Make Sense
One of the best additions to the core gameplay in 2010's Brotherhood was the optional primary mission objectives. Suddenly the ways of being an Assassin could be highlighted. Sure, someone doing a quick playthrough could complete the missions however they felt like, but those wanting the proper Ezio experience could hunt down targets exactly as he did. In an attempt to make the game harder (one thing people never praised Assassins Creed games for was their difficulty) the optional objectives were made a little trickier and a lot more specific in AC3. And in most parts it worked to challenge you to find the best killing method. But in a fair few missions you could easily spend an hour plus trying to find the one sequence of events that got you 100% completion. Things like not knocking into any citizens and timed naval missions were pretty much down to luck thanks to the unpredictability of NPCs, while many of them (particularly ones that required you to remain undetected or timed chases) required you to know exactly what would happen in the mission before it started. Now this is less testing your ability to be a good assassin, but willingness to sit through the levels until you know every scripted event by heart, betraying the whole notion why these were introduced in the first place.