- Do this on a level that features only Prometheans so that there's room for trial and error.
- Make sure to have Promethean Vision equipped so that you can see when a Knight turns its back without exposing yourself.
- This achievement also rewards the player with the Knight Helmet Avatar Award when unlocked.
- The title of the achievement could be a reference to the 1967 The Moody Blues song Nights in White Satin.
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