Check it out dudes
https://www.humblebundle.com/
Opportunity to get those games super cheap (just in case you don't want to torrent them).
6 games for less than 6 USD including soundtracks.
I've played Shatter, Torchlight and Vessel so far, they are quite good. Except Torchlight, which is excellent!
How often games are changed there?
Once a bundle is launched, it's supposed to stay how it is.
In the past however they added games to the bundle. I don't think that's habit.
I don't know if bundles are supposed to be periodic, but there are a few each year. Maybe every 3 months, I don't know.