The Tripods: Series One (DVD) François Périer GMs receive a bevy of James Whitmore GMs receive a bevy of information about running a campaign or lone adventure in this rugged terrain that includes rules and advice on adjudicating travel across this challenging landscape and waterways this adventure pits the heroes against a variety of horrible monsters and fiendish foes as they seek to thwart the evil machinations of the denizens of the Trollhaunt Warrens Earth has been conquered by an alien race known as the Masters using their giant Tripods cousins Will and Henry Parker embark on a journey to the White Mountains in search of a group of free men