My own little theory on the entire series

[TheLittleGarfield]

Oh, there's also the little detail that Red seems to know exactly where Philip is and what he is doing at all times, despite the fact there are no cameras around the mine. However, this could also mean that the real Red had long been dead and that it was the virus infecting Philip since early on and playing tricks with his mind, leading him down there.
[/spoiler]

That's about it...

Thoughts?

My guess:
Since they all the infected share minds, and Red was infected, the worms always knew where Philip was. There for, Red always knew where you were.

When I first palyed Penumbra I never even noticed that ^^ I thought he was just a crazy, friendly guy