" "Jovian Chronicles is a science fiction game setting published by Dream Pod 9 since 1992. It introduces a complete universe for role-playing and wargaming space combat, featuring mecha, giant spacecraft and epic space battles.
The setting was originally published as a pair of licensed supplements for the Mekton role-playing game; IANVS Games released the two volumes (Jovian Chronicles and Europa Incident) in 1992. This first edition is known amongst fans as the "Green Edition" because of the color scheme of its cover design.
The setting was re-published as a full-fledged game line, Jovian Chronicles (1st edition) in 1997 by Dream Pod 9, this time using their own in-house rule system. This edition, and all subsequent ones, are known as the "White Editions," though several of the supplemental books feature a dark blue starfield cover."
Jovian Chronicles (2nd edition) was part of the attempt by Dream Pod 9 to provide a single core rulebook for all of its settings, providing only setting specific rules and background in the setting's main book. However, the company soon afterwards stopped publishing new RPG material, leading to only a single setting book in the new edition."
Source: Wikipedia, "Jovian_Chronicles", available under the CC-BY-SA License.