Metal Gear Solid 2: Sons of Liberty HD Edition Tips

Get Off Easy
Run up behind a guard and point your tranquilizer or any other gun towards him. Don't go in front of him, he'll just watch you for a moment, then shoot you because it will appear you are not going to shoot him. Anyway, he'll put his hands up and sit for a few seconds. Eventually, he'll say 'Nothing here', and won't call backup. After that, shoot him. If you stay there longer, without shooting him, he'll turn and shoot you because, like if you aproach him from up front, he'll think you are bluffing.