You will get the following games:
Tier 1 - $1.25 US:
- The Silent Age
- Soulless: Ray Of Hope
- Cognition Game of the Year Edition
Tier 2 - $4.99 US:
- Evoland
- Californium
- Out There: Omega Edition
- Dead in Bermuda
- realMyst: Masterpiece Edition
In tier 1 all games come with a Steam key and DRM-free for both Mac and PC.
In tier 2 all games seem to be DRM for Mac, with the exception of realMyst which also comes DRM-free for Windows. That is how I read the symbols - please correct me if I read it wrong.
I reckon for all these games, this is a pretty good deal, especially since one also gets a DRM free copy for some games.
Enjoy.