How To Solve The Clock Puzzle In Alone In The Dark (Chapter 2)
has many puzzles for you to solve, including one in the Gallery of Derceto in Chapter 2 where you have to reassemble the plate pieces of a Clock. Arranging the broken parts of this Clock will unlock a new area to explore, allowing you to progress further. This task demands the right equipment, which can only be found by completing other puzzles along the way.