A super easy one, all you need to do for this achievement is sprint through The Bridge mission without killing any of the watchmen. Don't even attack them, as this will also assist the Redemption achievement with one of several CRUCIAL moral points. There is also one collectible to grab around the midway point while you're here.
Check out the video below for a full playthrough of the game showing all collectibles, miscellaneous achievements like this one, and the Moral Points I obtained (I skipped a lot of them) in order to get the Redemption achievement. The Bridge mission starts at timestamp 1:40:29