Monsters in the game (A bit spoilerish?)

[dufake]

That's the main difference between Penumbra.

Penumbra series' monsters are still fresh.
They could be trapped or what, but Amnesia's monsters are much like ghosts.

They are smartly scripted, so we always found them disappear in thin air.

The old tactic doesn't work now.
An improvement of the horror aspect, but I really want to see more advanced AI behaviors in games.