David F. Chapman was the designer for the Vortex System, the RPG system used for Adventures in Time and Space: The Roleplaying Game. He later revised the system for The Roleplaying Game: Second Edition.
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David F. Chapman was the designer for the Vortex System, the RPG system used for Adventures in Time and Space: The Roleplaying Game. He later revised the system for The Roleplaying Game: Second Edition.