What was the best chase scene in Penumbra/Amnesia?

[The Rock Worm]

Agh, hard to decide. All of them have made me shit bricks at some point.

The spider tunnel where you have to break walls, move rocks etc. oh god... Probably my most popular dying place in Overture on the first playthrough after the refinery's steam floor. Then there was the long worm chase that felt it's never going to end; where you had to close doors and avoid acid and stuff. So much tension! I didn't even notice you could close the doors at first so I was trying to manage without them for some time haha.

I too didn't noticed the second pair of doors that you could close myself. Look on the bright side, at least they were not made of wood. Otherwise that worm would have just barreled through as if it weren't there!