There are many achievements related to the plot mission in "Offer" and the achievements of the betrayal of the family are one of them. However, many players do not know how to do the achievements of the betrayal of the family. First, choose to support the iron-thorn and cause all companions to leave your team to unlock the achievements.
How to make a achievements in betrayal of relatives
Betrayal of relatives
Choose to support iron thorns and cause all companions to leave your team
Chapter 5, after the garden comes out, there is a multi-party meeting that can be archived in advance. If you have tested whether you have killed Lordwin before or not, you can choose this option. If you want to complete the achievements of [Become a member of the Iron Throat], remember to choose to support Iron Throat.
