Kevin Siembieda is an American game designer and author best known for creating the role-playing game (RPG) "Rifts" and for founding Palladium Books, a publishing company specializing in role-playing games. Siembieda was born on April 2, 1956, and began his career in the gaming industry in the late 1970s. In addition to "Rifts," Siembieda has been involved in the design and writing of several other role-playing games, including "The Palladium Fantasy Role-Playing Game" and "Heroes Unlimited." His work is characterized by expansive game worlds, intricate magic and technology systems, and a diverse array of characters and races. Siembieda has been a significant figure in the RPG community and continues to have a dedicated following among gamers.