"Use the secret passage" is a mission objective in Sequence 5 / Memory: End Of The Line
Walkthrough[edit]
Head to the North from the Train Conductor after you give him the Train Schedule he wanted. There is a set of stairs there that you can take downward.
Continue forward and down the stairs. You will see a pair of Blighters ahead. Rush them and take them out with a Double Assassination.
Just past them is an entrance to a sewer. Drop down into it to reach the secret passage.
Go down the stairs and follow them to this room. Drop down to the lower floor and continue through the tunnel in front of you to the right.
Go straight down this tunnel, jumping over the iron grating and into the next large room in this direction.
Climb up the scaffolding to the left or go straight forward and climb up the wall in front of you. Just ta
Take the ladder up to the top and open the manhole cover there.
Optional Objectives[edit]
- Free the station chief
- Use the secret passage
