New rules for running a d20 Modern campaign set in the past. This new rules supplement provides everything players and gamemasters need to participate in adventures in the time period between the Renaissance and World War II, including new character options and rules for early modern firearms. It begins with an exploration of the historical period between 1450 and 1950, then provides rules for creating characters and campaigns that blend realism and fantasy. d20 Past also presents alternative campaign models, along with all the rules needed to play swashbuckling pirate adventures, Victorian horror investigations, thrilling Pulp Era escapades, and more, including three ready-to-play campaign modules. AUTHOR BIO: James Wyatt won an Origins award for Oriental Adventures™. He has also co-authored numerous roleplaying game products, including the Eberron™ Campaign Setting, Sharn: City of Towers™, Draconomicon: The Book of Dragons™, and Book of Exalted Deeds™. AUTHRO BIO: Gwendolyn F.M. Kestrel is a managing editor for Wizards of the Coast, Inc. In addition to editing several D&D® books, she co-authored Underdark™ and Planar Handbook™ for Wizards of the Coast, Inc.