References and easter eggs you found

[Omnitool]

Anyone find any callouts or easter eggs for Amnesia or Penumbra?

I did find something that reminded me alot of Penumbra Overture.

At site Alpha, after Ross gets eaten by the giant mutant fish - worm creature, you must exit through a tunnel. About halfway through that tunnel, there is like an earthquake, and you must run because the giant fish / worm is chasing you, if you look back you can see it coming.
That scene reminded me a lot of the giant mutant worm from Penumbra Overture that chases you through the mines. The worm in SOMA is strikingly similar to the one in Penumbra, their mouths are identical.