I have a couple questions which I would like answered.

[Yuhaney]

Second, in the beta, there was a point where you were walking down a corridor when there was a brief moment where the colours changed a bit to red... I read somewhere that this little event would be explained fully in the final release, however as the game changed to being in a cave-mine, we never got to find out.

You're infected.
Like said during Black Plague.