Skilled Sniper Achievement
Stop the executionThis is story related and cannot be missed. This can be earned on any difficulty.
During Mission 4, 'Opernplatz', your objective will be to stop the execution of Dr. Efram Schweiger, a German scientist who is reluctantly working on the V2 project. Work your way into the library to the objective marker and a short cutscene will play showing a German officer aiming his pistol at Schweiger. You need to shoot the officer and the two troops flanking him. Once all three are dead, the achievement will unlock.