"Escape the Asylum" is a mission objective in Sequence 4 / Memory: Overdose
Walkthrough[edit]
Turn to the left inside the Operation Theater. You will find a locked door there you can use the Master Key you got earlier to open.
In this room, turn to the right and take cover.
There is a nearby orderly that can either be leaning over a table or patrolling. If he is leaning over the table, just slip by. Otherwise, let him pass by then eliminate him.
Get into the hallway and climb the ladder in front of you. If you opened this door earlier, there is a chance it will be closed.
Get outside using the window at the top of the ladder.
Now, grab the carriage in the courtyard and leave the restricted area or just run outside the area. Either will complete the memory.