Kevin Siembieda is an American game designer and publisher, best known for founding Palladium Books in 1981. He has played a significant role in the development of tabletop role-playing games, particularly through his work on the Rifts and Palladium Fantasy game systems. Siembieda is also recognized for his contributions as an artist and writer, often illustrating and writing for the games he creates. His passion for storytelling and world-building has influenced many players and designers in the tabletop gaming community.