Translated from the publisher website: The Game master's Guide is one of the two basic Metal Adventures books. It is essential for the the game masters. The Game master's Guide presents the secrets of the last millennium, the imaginary universe in which the game take place. It also contains many tips to play Metal Adventures, play the role of game master and how to stage adventures. The Game master's Guide offers the GM all the tools he needs: - the rules of space travel - the rules for creating NPCs - the description of the Havana system, the haven of pirates - a bestiary - NPCs ready to play - ship crews ready to play - the summary of the El Barco del Sol campaign and the first episode of it, ready to play. The Game master's guide gives the GM all the secrets of Metal Adventures and allows him to be autonomous starting his first games.