You misunderstand - the problem is that you're writing the publisher, the game's name, and the platform (one or the other) in the description.
There's no need to use the game's name since it's already in the title, the publisher isn't needed most of the time (unless it's for a game that has quite a few independent guides) and the platform is only listed when there's various versions of a book... and that info usually goes in the title, to make sure people add the right version of the book to their collection.
You did fine, you just added some info that's already detailed in the rest of the entry.