Complete the game without ever losing your Bones.
How to unlock
- Requires a full playthrough where Mina never dies in a way that drops her Bones currency, or always recovers them before next death.
FAQ
How do you get Bone Keeper?
Complete the entire game without ever losing your Bones — never die in a way that drops them, or always recover them before the next death. Proto Spark trinket helps but may not be enough alone (VGTimes).