I know I have to include a credits file. Do we have to list the assets we use that we own the rights to? For example, I'm using a monster from an asset pack I got off of the Unity Asset store. Do I have to list that? Also, some of the stuff I am using as placeholder art came from Opengameart. They don't list the creator's actual name, just their screen name. I've tried contacting them directly but the ones I am using are a few years old and I haven't gotten a response back yet as to their actual name. What I have been doing is listing the web address, the author's name, and the license it is under. Is that enough?