What to do? I have climb on the roof. Beeing the rooms where is huge clock.. tried push the buttons.. nothing happens. Then there is a window whitch I have shoot - but cant manage to jump there? Any hints or clues ?

Try going down past the clock, all the way to the river.......

From the level where the clock is, look for all the skeletons. In that area is a ladder that leads down to a room that is full of gears. Make you way through this room to another area where you can drop down. Here you will be standing in a ledge looking down to an area that has a large water wheel to your left with water running below it. Make your way down. Once at the ground level, look closely at the big block on the opposite end. If you stare at it long enough, you'll figure out what you need to do.

-Damian

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Fear is the path to the darkside.