Palladium Books is a publisher of role-playing games (RPGs) perhaps best known for its popular, expansive Rifts series (1990–present). Palladium was founded April 1981 in Detroit, Michigan by current president and lead game designer Kevin Siembieda, and is now based in Westland, Michigan. The company enjoys the support of a small but dedicated fanbase who praise its various game series for their innovative settings and ease of adaptability to various personal preferences, play styles, and power levels. Palladium published the Teenage Mutant Ninja Turtles & Other Strangeness (1985) RPG and its supplements.
- Teenage Mutant Ninja Turtles & Other Strangeness was based on the original comic books. However, due to waning sales (blamed on the childish nature of the original television cartoon), the license was not renewed when it expired in 2000. Many concepts established in TMNT continue in both Heroes Unlimited and After the Bomb.
- After the Bomb, a post-apocalyptic RPG that began as an alternative campaign setting for Teenage Mutant Ninja Turtles & Other Strangeness, but soon developed into its own series. In it, mutant animals struggle for survival, often against human supremacist nations.