To add a new category to a page you can click the Category button at the bottom of the page and type in the name you'd like your category to be called.
A full list of existing categories can be found at Special:Categories.
“Versions are usually upward and downward compatible. An exception to this is the addition of...List of old Game Versions
“Hello! This will be the official Dev Blog for the upcoming release of Godra Final Game 1.0. Here...Dev Blog