Wikipedia:Articles for deletion/List of filename extensions
There is nothing wrong with this list in principle. The Wikipedia:Stand-alone lists|stand-alone list guideline does not require that every entry be blue-linked.  In fact, it explicitly points out that for a group of items where none of them are notable enough to have articles, a list is a good way of covering the topic ().  Having said that, the page(s) are badly in need of clear inclusion criteria.  In my opinion, file formats that are only ever used within a single game or app are not suitable for inclusion.  Only files that might be exchanged outside the app that created them, or file formats that are common to multiple apps, are useful to include.  But that is not something to be resolved at AFD
— User:Spinningspark, 01:37, 10 November 2019 (UTC)
Stance: keep
Cited policy: WP:CSC (Wikipedia:Stand-alone lists)