Torg is a game set in an alternate history of Earth, called Core Earth. Core Earth has been invaded by High Lords from other Realms with their realities. These realities are defined by technology, magic, spirituality, and social axioms that defines what is possible in each realm. For instance, a machine-gun is contradictory in the high fantasy world of Aysle, while a magical sword is contradictory in Core Earth or the Pan-Pacifica realm.

First edition Torg, generally referred to as classic Torg or original Torg, was originally published as a boxed set with the rulebook, a Worldbook, and Adventure Book, the Drama Deck, and an eternium-themed d20.

Torg Eternity is the second edition of the game. It features rebooted versions of the cosms, and revised but similar rules systems to the original.

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