Katrielle and the Millionaires' Conspiracy walkthrough
Puzzle Location: The engine room (Mr Rector)
There are five metal plates pinned up on the wall.
What do you think should appear in the place of the ? in the middle?
Look at the six shapes below, and put two of them together to make the shape that takes the place of the ?.
Trying to make letters isn't going to go well.
You should play around with the shapes and see which combinations you come up with.
The '?' is replaced with two letters.
Look at the letters around it to figure out which ones.
However, you cannot make letters out of the shapes available.
The '?' is replaced with something relating to sound.
Try making the shape of a CD (Compact Disc).
The answer is '1 and 3'.