To even unlock the secondary quest this takes place in, Reason of State, one must do the following:
- After the main quest, Count Reuven's Treasure, Triss will ask for you to help her with something. Go talk to her in The Bits to start A Matter of Life and Death and complete it.
- Continue the main questline until you complete A Favor for Radovid, which will then allow the secondary quest Now or Never to start (a messenger nearby should give it. If not, talking to Triss again should start it). Finish the quest however you like.
- Complete the 3 assassins' quests:
- Once all secondary quests are taken care of, continue the story to Act III, where the main quest Final Preparations starts. As part of this one the main quest, Blindingly Obvious, is now available. Near the end of Blindingly Obvious, after you have Philippa, Dijkstra will stand in your way. Do not use violence. Instead, tell him information you have on the emperor. This will then unlock Reason of State.
You must now participate in Reason of State. No matter what you decide in the end, the achievement will then unlock.
Community content is available under CC-BY-SA unless otherwise noted.