Rise and Decline of the Third Reich or more commonly Third Reich is a grand strategy wargame covering the European theater of World War II, designed by John Prados and released in 1974 by Avalon Hill. Players take on the roles of major powers—Germany, Italy, United Kingdom, France, the Soviet Union, and the United States—from 1939 to 1946.

Avalon Hill Games Inc. is a game company that publishes wargames and strategic board games. It has also published miniature wargaming rules, role-playing games and sports simulations. It is a subsidiary of Hasbro, and operates under the company's "Hasbro Gaming" division.