Don't get me wrong, those 6-8 hours I found excellent.
Even if it was the best FPS I had ever played (HALO is the king, next HL) I would still critic the game negatively because of it's length. BTW, HALO is about 10 hours as well, but I "might" buy it for PC because of the incredible MP possibilities, alhtough I might be engrossed in C&C:Renegade before that, heh

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As I said, if you can play it from a friend who has a copy, unless you enjoy the MP, although I find DoD to be a much better WW2 experience (if that's your type of game)
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See you in there.