Diana: Warrior Princess is a game that is so out there it is hard to quantify it.
Lets start with the easy part first, the game system. The game is very cinematic and focuses largely on characters can do that is cool, amazing or fun. So no stats for cooking here, unless of course one of your characters is a notorious Iron Chef (which would totally work with this game).
Now the premise. Take our world, but go many thousand of years in the future. Now make a TV show of our times, but give it the same historical accuracy (and sense of over the top cinema and fun) as Xena: Warrior Princess. That is D: WP, except you are playing in that world and it is all real to you. So tons of characters make appearances that we know of today. England is a land ruled by Queens Victoria and Elizabeth with the undead Thatcher in control. Just tons of over the top things like that. Adding stuff is easy. There might be this new Robber-Baron from the USA that uses technology to suck the lives out of people into his magical book that keeps a representation of their face. This dreaded artifact of the ancient 21st century was known as "The Facebook"! Just like that. Hard to say what being Googled will mean!
Don't take this game too seriously and you will have a lot of fun.
If you are the type though that looks for internal consistency in your worlds and retcon is a dirty word, then maybe don't get this.
But everyone will have a really fun time.
[4 of 5 Stars!]