There are 3 achievements to get for this challenge in the New Bioshock The Collection. Follow my route and you should get all 3. It is pretty straight forward. I practiced this many times and got a really fast time so relax because you have an additional 1 minute and 12 seconds to finish it for the achievement.

Pacifist - Rescued the Little Sister without destroying any Machine Gun Turrets

Expert - Rescued the Little Sister in under 3:00 Minutes

Rescuer - Rescued the Little Sister

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