From #openttdcoop wiki
Category:Help is for MediaWiki generic site user help. Only pages in namespace "Help:" should be in this category. Note that all pages in namespace "Help:" are released into the Public domain so that they can be easily imported into any MediaWiki instance regardless of the specific wiki's own license. See Project:PD Help if you want to help us.
Every single English-language page within the set of public domain Help pages should directly be categorized [[Category:Help]] (additionally putting pages in other categories to provide further sorting is possible). This is needed because of later half-automated creation of the PD Help package from this category.
The front page is Help:Contents
Pages in category "Help"
The following 27 pages are in this category, out of 27 total.