The Heavy Gear universe is the primary setting published by Dream Pod 9. Set on the colony world of Terra Nova, the setting explores the conflicts between the various leagues of city-states that dominate the world's politics, as well as fending off invasion from a newly re-expanding Earth. The setting draws its title from the humanoid mecha which serve as the primary fighting tool on the planet.
Initially published as a game with both RPG and tactical rule elements, Heavy Gear (1st & 2nd Editions) consisted of a vast array of sourcebooks covering the various factions on Terra Nova, as well as the invading Earth forces, and some of the other colonies as well.
Heavy Gear (3rd Edition) was a repackaging of the setting as part of Dream Pod 9's attempt to publish a single core rulebook for all of it's game settings. This edition produced a small number of books before the company refocused on publishing the tactical game, in the form of Heavy Gear Blitz! Rulebook.