Excuse me, but, normaly, a movie isn't video game footages well agenced to appear like a film. Second thing, halo 2 graphics and effect are far behind those we see in final fantasy, matrix or even game like doom3 or half life2 . You could have converted halo2 with half life2 models (with source development kit) make the whole story using scripts in order to run the movie as an intro of a game. i guess this would have been better but....even with this...

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I don't think that:
"Time is a predator, that seeks us all our life..."
But that :
"time is a companion, who takes part of our great trip through life..."
Huhuh, Star Trek Fan