Anaphyis

So you've found an answer to this conundrum of yours already but were a bit slow on the uptake. Thanks for sharing. You have an option. Use it. Don't pretend to talk for some nebulous majority and then campaign for taking that option away from others under the pretense of caring for Obsidian's budget. I'm sure a game with even less voice acting will do wonders for said budget in a market where enough people are already complaining about having to read stuff.

Yes, I did put the amulet on titan's hand, talked to the hunter and got the dragon debuff skill from her before returning to the Adra Dragon. The game didn't give me any dialog option to attack the dragon either and I had to do so manually. Achievement still popped, right after killing the dragon, so I doubt it's connected to the drakes because I obviously did that before entering endgame.

Then they would've gotten the other achievements as well that are still at 0%. Besides, I did get the achievement legitimately so I can confirm it working at least sometimes: killed all dragons during their respective quest lines and betrayed the adra dragon.