Friends With Benefits is an achievement in The Witcher 3: Wild Hunt and requires one to complete the entire subplot involving Keira Metz.
To first meet her, continue the main quest Hunting a Witch where you'll bump into her. Continue with Wandering in the Dark, help out in the short side quest Magic Lamp then complete the following:
- An Invitation from Keira Metz
- A Towerful of Mice
- A Favor for a Friend
- For the Advancement of Learning
Tips[]
- It doesn't matter what becomes of Keira during the last quest, just as long as you complete it.
- This can be tied into the achievement Full Crew if you send Keira to Kaer Morhen.