Practically you can get this achievement naturally while playing the game, but if you wish to rush for it, it can be done playing the first mission of the first scenario (Hard Times), just decline the tutorial and play on your own trying to shoot as many enemies through the tents as you can (after mission is failed or complete, just restart the scenario again). I believe you can also get the achievement by completing the tutorial 10 times, as it assumes one "blind shot" during education.