Completing the levels is not very difficult, but I would like to share the following video; It is a very good guide on how to complete the chapter, it also shows the location of the emblems and weapons in each Chapter.
Most videos have been deleted in the guides (I think youtube deleted the videos or those videos are private), I hope it helps, as it was helpful for me.
thanks to hdsjonathan for uploading the videos to YouTube. He plays in PlayStation 3 version, but the gameplay is the same so there is no problem.