Help with Vegas.

Dam I never thought that the first Vegas would be so hard to complete, I mean holy shit the AI could be dumb sometimes but they sure can be accurate with their shots (maybe because they are an elite group of mercs). Another thing that pisses me off bout Vegas is the damn shotguns they are too powerful. Anyone have any tips or strategies to help me through this game??Dam I never thought that the first Vegas would be so hard to complete, I mean holy shit the AI could be dumb sometimes but they sure can be accurate with their shots (maybe because they are an elite group of mercs). Another thing that pisses me off bout Vegas is the damn shotguns they are too powerful. Anyone have any tips or strategies to help me through this game??