You get Steam keys for the following games: Z.A.R.,Pier Solar and the Great Architects + Soundtrack, Shadowgate (2014),Morningstar: Descent to Deadrock, and Hektor. Shadowgate DRM-less is available on Gog for about $2.50 today if you can live without achievements.
There are a few extra things, mostly music, with this bundle, as well as a mystery game.