Be sure to explain jargon when you include it in an article. Not all visitors who read your article will be hard-core fans who already know many of the details of (for example) the World of Darkness, so they might not understand all of the terms that the games frequently use.
The simplest way to explain jargon is to create a link to a separate article where that term is explained. For example, rather than explaining what a phyle is, link to it instead. This way, many articles can all use the same terms and each link to the same single article where that term is explained.
(It would be great if you could also explain the jargon you use to explain the jargon, but that might be pushing it a bit. WWWiki assumes that visitors are at least familiar with the basic settings and such of the various games, so it's not essential that all jargon be explained.)