animalmother2105: 1. When I clickk on Content in the Main Menu, there are three sections. Are those something like separate stories= When I start a new game, there is only the first. Does that mean I have to unlock the other two by finishing the first.
2. Do I understand it correctly, that there is fan-made content (modules?). So those are new stories etc.?
1. One is the campaign and the other two are the assets the campaign uses.
2. Yes, or you can make your own with the editor (one of the buttons in the Content menu).
The first sticky in this forum explains how to get mods from Steam workshop without using steam, you can also get UGC (User Generated Content) from ModDB and other such sites.
EDIT: Shadowrun Returns and Shadowrun Dragonfall are two independent games, so you'll need to buy Shadowrun Returns in order to play that campaign.