Amnesia: The Dark Descent Walkthrough: Chancel (Assembling the Orb)

Go up the stairs. Crouch and turn off your lantern. Go through the door.
We’re now finally in the Chancel. There are bluegreen flames lighting up
the area. This was the part where we got ambushed.

Move forward and you’ll notice that there are three interconnected bridges.
The one to the right has been broken already, although it was accessible
during an earlier part of the game. It was an optional extra trip.

In front of us, we have bridges that lead to doors to the left and to the
front. The door to the left leads to some machine parts while the front
door leads to the magically blocked path.

From where we are, cross the bridge and reach the center. We need to go
to the room to the left, so turn left and move forward. You might suddenly
see a monster shambling towards you coming from the room. At this point,
run back to where we started and go through the door and down the stairs.
Wait a minute or two and then go back up.

When it’s safe, cross the bridge again up to the middle, turn left and
move towards the door. Enter the room.

In the room, there’s a shelf in front of you that has a tinderbox and
a Bucket of Tar. Grab them. On the table is a note, read it.

The note is part of Daniel’s diary. Daniel contemplates about how he has
killed lots of people in an attempt to save his own life. He feels like
he’s become a very horrible man and he feels guilty.

After reading, grab a rock in the room and go downstairs. It’s a room with
machinery, in the middle are gears. The corner in the far right is a good
hiding place in case of a monster attack. Throw the rock into the gears
to make the machine stop. Be sure you’re a little bit far away since some
debris might hit and hurt you. After this, go back up the stairs and open
the door. If there’s a monster here, close the door and run back down to
the machine room and hide in the corner where it is safe.

Anyway, if you don’t encounter a monster, just cross the bridge back to
the middle part and turn left. We are now going to the room with the
magical barrier. Move forward and enter the room.

Inside the room, in front of us is the weakened magical barrier, but it’s
still there. If you try to touch it, you’ll get hurt. Look to the left
side of the room. There’s an orb receptacle.

Open your inventory and use the Bucket of Tar on the receptacle. Now,
put all six pieces of the orb in the receptacle. Watch as the orb absorbs
the power of the magic barrier!

Run through the passage and enter the door to the Inner Sanctum!