Activated key, game doesn't appear in steam profile.

Restart Steam edit: That game has always had that problem, some people say if you play it for at least 5 minutes, then resync it'll show. But, that doesn't work for everyone.

Happend with HB key for me too, restarting Steam will fix it.

u said that like sth. is wrong?

Serious Sam HD Episode 2 is like that. Don't worry.

Serious Sam HD: The Second Encounter is like that, among others games including a couple of Sherlock Holmes and others, and they will stay like that even if you re-start the Steam client until you download and play them. Before that, they won't appear in the "All Games" tab.

The important thing is if they appear as owned in their Store pages, or appear in the Steam client, then you have nothing to worry about. If you want a confirmation, just check the Account Details and there it should appear the license for the game as "Retail".

For games like this, just download and play them, and they should appear later.