Classify all games from Frictional (from worst to best)

[RawkBandMan]

1 - worst
6 - best

1: Penumbra: Reqiuem
2: Amnesia: Justine
3: Penumbra: Overture
4: Amnesia: A Machine for Pigs
5: Amnesia: The Dark Descent
6: Penumbra: Black Plague

Just to clarify, I like all of these games very much and I don't hate any of them, this is just of how much I enjoyed them or liked them.