And if you have Steam, you can get a key to get the games activated through there.
I already had three of the six games in the bundle on Steam, but I went ahead and gave $20 for it, since it's nice to get versions not tied to Steam. For kicks before I bought it, I typed in 1 cent, and it asks you to verify that you're human.
And this wasn't here when I bought the bundle, but if you pay more than the average (currently $4.80), you get the games from bundle #2 for free. But they still gave me the other five games, anyway.