I collect gamebooks [Fighting Fantasy, Lone Wolf, etc].
Wonder what that falls under? Books most likely, but also sort of like tabletop RPGs.
http://www.goodreads.com/ has quite a few Fighting Fantasy, Lone Wolf & other gamebooks in it's database. Just from a quick search I'd say most of not all of them reaching well past 300-400+ entries. If you apply for "Librarian status", you can add any that are missing as well as upload scans of the front covers.
Think of it as the RFGen of books, just not as cool.
Also good for strategy guides as well, I have 33 of those listed on there myself.