User blog comment:Rappy 4187/Technical Update: August 27, 2013/@comment-2093602-20130828185237

I got a popup saying I can promote my wiki to Wikia game guides directing me to a help page. It says I need to active game guides in WikiFeatures, but it isn't listed there.

Edit: actually Special:GameGuidesContent seems to work already, so...

Also, while on the subject, the Game Guides page you linked has some HTML errors (you can know because the "Retrieved by ..." line on the bottom is visible). It's mostly tags that are closed but not opened. Here's a quick diff (ignore the actual page which obviously doesn't work on my test wiki).