After playing the reletively new game, I've noticed a few tricks that can help others overcome some of the difficult stages.
-First off, Be Patient. Most of the game depends on the ability to wait long periods of time to be able to watch for guards to move to, or away from certain areas so you will be able to make your move towards the target.
-Hiding in small areas/rooms. Another simple way of waiting un-noticed for a guard or the target to travel to certain locations. If a guard enters the area, it often helps to enable cloaking/invisibility for a short while. After looking into space for awhile, the guards usually exit the area and look in others.
-Try not to run through bloody areas. When Guards see bloody paths, they follow them. When you make a kill or get shot, try to wear off the blood by walking around a small non-bloody area swiftly before you make a dash through an open area.
~Now for more difficult strategys.
-Dashing through heavily guarded areas. Later in the game, this is usually something that is needed to be done as certain areas tend to be more guarded constantly. This is not reccommended to be used very often, as you will often be shot in the process. But if you think you can make the run quickly enough to a room where you can camp untill the alarm process wears off.
-The Distraction Method. A trick I found on accident. This is best to try out in an open area on the opposite side of where the target is. Once you are in appropriate position, walk out in the open, but save your dashing/cloaking energy. Hopefully a guard will see you. Let him shoot you once. This will leave a small area of blood on the ground. Now quickly leave the area away from the guards using while using dash and try to avoid gun shots. The guards will sometimes chase you, but they usually head for the area of blood
