Illuminatus
Very rare1.8%GrindMissable
Picked up every tinderbox in Amnesia: The Dark Descent.
Collect every tinderbox in the main game. Many are in areas you can't return to once you've moved on, so follow a per-level tinderbox checklist as you go - a missed one means replaying that level. Hence missable.
All tinderbox locations, level by level