This is Gears of War 3 walkthrough part 1 titled "Act 1-1: Anchored" from the Campaign.
For the complete Gears of War 3 Walkthrough with lots of tips and videos, go to:
http://www.videogamesblogger.com/2011/09/20/gears-of-war-3-walkthrough-video-guide-xbox-360.htm
