You are still not listening.  Spoilers are allowed by the Wikipedia guidelines, but no more than necessary should be included.  The stuff currently in the article is going overboard.  When a series consists of multiple games, spoilers are kept off the main article and placed on character pages/lists or articles for the individual games.  You wouldn't expect to go to an article for a movie and find spoilers for the sequel, right?  And I've seen many main pages for game and movie series, and they all just contain general info, with links to other, more specific articles.