Your digital extras included with Wasteland 2 are found in different locations depending on what store you got the game on.
- Steam: Open your game Library page and then right-click on Wasteland 2 -> Properties -> Local Files -> Browse Local Files. This will open your game install directory, where you'll be able to find any digital extras.
- GOG: Visit your game library page and open Wasteland 2. You'll see all extras you are due listed under "My bonus content".