Castle Falkenstein is a steampunk-themed fantasy role-playing game (RPG) designed by Mike Pondsmith and originally published by R. Talsorian Games in 1994. The game is named for a legendary unbuilt castle in the Bavarian Alps. Players play the roles of gallant adventurers who take on quests of intrigue and derring-do in the spirit of Victorian adventures such as The Prisoner of Zenda.