Haven: Secrets of the Labyrinth
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Haven: Secrets of the Labyrinth is a 1983 role-playing game supplement published by Gamelords for Thieves' Guild.
Haven: Secrets of the Labyrinth is a supplement in which a campaign setting details the thieves' guilds of Haven City, with a particular focus on the Black Hand guild. As a sequel to Haven: The Free City, it also explores thieves' markets, mercenaries, major non-player characters, and provides guidelines for haggling.[1]