Stealth Hunter

War is about to break out, and you are sent as a special force to perform secret missions, destroy local secret bases and successfully escape. You are a stealth hunter, a ghost who is never seen by the public or its target. You have entered a world in which enemy operate under the radar, sneak behind enemy guards and knock them all out! Subdued them, because the enemy's weapons are more advanced, you can choose to backstab or raid from the side, don't forget to collect the keys and smash everything you see!