Assassin's Creed Chronicles: Russia

During Sequences 8 and 9, you will be sneaking through the Assassin ranks. This is the only point in the game where silent takedowns are at all useful, but generally areas are tight and packed with guards, and ultimately I found it easier (though still tricky) to sneak through. Don't bother with your smoke bombs, as most (if not all) of the enemies by this point of the game have smoke masks. Stick to non-lethal takedowns and electrocutions.

At every checkpoint, note your ranking. If it says “Shadow” or “Silencer,” you're good to go. If it says “Assassin,” you'll need to reload the checkpoint. The trophy will pop during the final score tally at the end of Sequence 9.

UntilTammaro has put together a video walkthrough for this trophy. He doesn't seem to use electrocutions, but keep in mind those count as non-lethal takedowns and will not void the trophy.