I was recently building a small section which is basically a collection of video games (along with some books and movies) that I own. I was storing all these items by the UPC or ISBN number associated with it, but this only really works for physical products.
Currently, I'm just not listing PSN games because I don't really have any way to identify them. I was wondering if there were ID numbers such as barcodes for PSN-only games that could be found somewhere, either in the PlayStation store or on their website. For example, is there some sort of ID number for Okabu, which can only be bought and downloaded from the PlayStation Store?