Gears of War 3 has been labelled by critics as the best game of the series with one of the most dramatic stories in the franchise and a step ahead in the graphics department compared to previous titles. If you don't believe me, you can check out the full list of reviews here.
If the reviews don't persuade you, this walkthrough surely will. Youtube user, theRadBrad, will be uploading the full Gears of War 3 video walkthrough of the campaign mode which answers the majority of the questions that you might have about the world and the story behind it.
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Part 11
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Part 13
Part 14
Part 15
Part 16
Part 17
Part 18
Part 19
Part 20
Part 21
Part 22
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Part 24
Part 25
Part 26
Part 27
Part 28
Part 29
Part 30
Part 31
Part 32
Part 33
Part 34
Part 35