After playing Amnesia, is Penumbra any good?

[Yuhaney]

Absolutely. Penumbra is a MUST play!
I enjoyed Penumbra more than Amnesia, to be honest.

...and I say it straight about Requiem:
If you wait the same than from Overture and Black Plague, you dissapoint. But if you wait the same than from Portal, you love it!
I liked Requiem. Mostly because I knew what to expect. Others waited for more horror... I wanted more puzzles, and there it was: Requiem.