So after seeing the first minutes when you're in the boat in the beginning of the video it says: [url=http://www.youtube.com/watch?feature=player_detailpage&v=60zmVrtIBzw#t=30s]The mind....[/url]
So what i think is its all in he's head, He failed a girl in real life and now he try's to redeem himself.
And also i think Elizabet is some kind of president in Columbia that's why the people need her so bad. In the other 15min demo gameplay you see a huge statue of her holding a American flag.
*Major spoilers*
When you die in the game, You wake up in your old office and when you go through a door you wake up in the game again.
[Edited on 01.08.2013 7:04 AM PST]
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That would be -blam!- bollocks.