Octave (Steam key/Region free).

http://store.steampowered.com/app/537700/
Octave is a point ´n click horror-adventure game with elements of action and quest.

You play the role of a guy who happens to be in the wrong place at the wrong time. You are dragged into a dark forest, but on the verge of death, you are mysteriously saved from your killer by a someone or something.
As you venture deeper into the woods you find yourself surrounded by atrocity. You realise that salvation can turn out to be a real nightmare. All the way through fear you seek out the mysteries of the dark forest.
The struggle for life has only just begun!

In the game you will see:
an atmospheric dark forest with creepy shadows and monsters
an old house full of puzzles and paranormal activities
the underworld, where you have to run a lot