Story things I need clarified *SPOILERS*

[mmiller24]

I think most of the questions have been addressed pretty well.

As for question 10, I had always been under the impression that Philip was either killed or affected by the Tuurngait at the end of Black Plague and Requiem is the account of his after death experience or some creation of his own mind that was possibly brought about by the mostly unexplained powers of the Tuurngait. This would explain the appearance of previously dead characters and the even less real feel to the game. The alternate endings, joining Red in the incinerator or return to the fishing boat and escaping, both bring a sort of closure to the story, depending on your interpretation of how the events in Requiem were started.

Honestly, it's an extremely confusing end to the series and I doubt I can do it justice. I'll have to replay it again sometime and try to better understand it.