Amnesia dark descent vs penumbra black plague

[Googolplex]

All I knew about it was that it didn't directly connect whit the previous games or something. And was more puzzle focused than the others.

That's also wrong. Requiem is a part of the Penumbra story and continue it to an end.

It's not only a cobbled puzzle game! I sayd already, people doesn't understand that.
Perhaps you should buy Requiem, otherwise you never played Penumbra to an end.