[Spoilers] Amnesia Plot

[perpetualmind]

I think alot of the things are intended to be open to interpretation.

At points Daniel talks about being bathed in blue light whilst he was in the tomb, the power of the orb.
Maybe this is what happens when the orb connects itsself to a person?

The dakness was some kind of creature that protects the orbs.
At one point it talks about a beast that howls (and i seem to remember it mentioning wings).
To me that seems like a bit of a referance to Lovecraft's "The Hound".
Other than that we can assume that the darkness is some form of otherworldly being that alters the environment around it.
Its clear that the orbs act as keys to another world, and so whatever is protecting them could be in that other world or inbetween, hence the sense that the darkness is more of a state than a living being.

I was curious about the thing with Alexander myself...
I think the reason he is trying to go through to the other world is to be re-united with a woman, as a few times his notes seem to be referring to being with her soon and such.
As for what he is, maybe that is something related to the orbs?
Or maybe in his reaserch he has discovered a way to extend life?

I really enjoyed the story in Amnesia, and in a way i like that there are so many things left for us to think about.