Direct answer
The category index is a list of catalog records. Open a game before you download. If the list is empty, the filter matched nothing — clear it or browse all games.
Use a category when you know the genre. Use search when you know the name. Do not paginate hoping a later page is “better”; the order is the catalog order, not a quality award.
Skip a card that has no download and no reason to open it yet. Come back when the record has a file or a source link.
These topic pages group games under a single theme and link to detailed game pages (internal linking).