Can Penumbra Requiem be bought separately?

[Skaruts]

Thx Jens. I actually bought the other two in GamersGate too.

Btw, isn't there a way that I can keep the installer with me? I mean, the only reason I hate buying in this website and some others, is because I'll always have to download it whenever I need to reinstall it again...

The file I download from there and that runs the installer asks me if I want to keep it, but I never knew where it is to begin with... (Or maybe by installer it means the same 60KB file I downloaded?)