This Referee's Guide contains material from previously released Dark Races and Proto-Dimensions. This book contains a large section on creatures and new dimensions for players to explore. You will find all the rules, start-up adventures and creatures from the dark abyss needed to play in this dark game of sci-fi horror.
Dynasty Presentations, Inc (DPI) produced a Basic edition of the Referee's Guide to be sold in game stores and a Master edition that was sold exclusively through the DPI website. The Basic edition was an abridged version of the Master edition and retailed for US$18.00 compared to the Master edition which retailed at US$30.00 (1998 pricing).
This practice was also applied to the Player's Handbook.