From the Wikipedia entry:
The game is a parody of Xena: Warrior Princess, and its setting tries to portray the present day with the same level of accuracy that Xena portrays Ancient Greece – i.e. not much. Historical figures are distorted and confused with each other. Diana, Princess of Wales rides around in shining white motorcycle leathers on a semi-sentient motorbike, doing battle with the war-god, Landmines, and Bonnie Prince Charlie, from whom she took her mystic powers of Royalty. She is aided by Fergie, the Barbarian Red Ken and Wild Bill Gates, while Tony the Vampire Slayer battles the sorceress Thatcher and her masked assassin Archer. The milieu also includes figures such as Emperor Norton, Queen Victoria and the "disease" lepus.Steve Jackson's download service e23 sells copies so I might have to pick one up and give it a spin.