Assassin's Creed Syndicate

Mission 4-1. When you come to the factory, don’t rush to use your eagle vision. Only after turning it on does the “stay unnoticed” condition appear. I was able to cut out almost everyone except two people (one of whom needed to be kidnapped in the plot). The method only works when completing the mission from the beginning. When restarting from the last point, the condition appears immediately.

When completing the last task "Overdose", if you complete it 100%, one of the conditions is the possibility of a unique kill. In order to do it, you need to go down to the basement. If difficulties arise in finding a place exactly where to go down, we do the following: we hire people from a gang of rooks, turn on eagle vision and look down, when we find enemies there, we give the command to the gang to attack and run after them, they know where the entrance is.