Taking the shot from the sniper nest | Mission 8 - Ratte Factory Sniper Elite III Guide
Last update: 11 May 2016
Right after you leave the factory, hide behind the nearest rocks, because there are 3-4 enemy soldiers around. Since these are the last enemies that you encounter during the game, you can use the nearby machine gun turret to eliminate them. If, however, you want to avoid detection, use a suppressed weapon, grenades and stones, to distract the enemies.
Continue on your path only after you have completely secured the area. You need to reach the last, third, sniper nest (blue point 3 on the map), which is located on the hill, across the factory exit.
Lay down on the ground and aim your sniper rifle. You need to hit the catch shown in the above screenshot. The only thing that you need to do now, is watch a longer cutscene, which ends the game. Congratulations!