Assassin's Creed Chronicles: India

Every time you pass a checkpoint in AC Chronicles: India, you will be assigned one of three ratings: Shadow, Assassin, or Silencer, depending on your play style.

To achieve a Shadow Gold rating, you must be entirely stealthy, and not kill or take down a single enemy.

You will naturally obtain this during your Plus Hard playthrough if you're playing the Trilogy Pack version of the game. Otherwise, you may have to do some minimal farming.

The best area to grind out Gold rankings is in the beginning of Sequence 6. There will be a single guard. Throw a smoke bomb (you cannot kill him otherwise), run past him, and round the corner until the checkpoint activates. As long as you don't continue climbing past the checkpoint marker, resetting the checkpoint will put you back behind the guard (thanks ShadowStefan for finding this method).