Through a Glass, Darkly



Through a Glass, Darkly was the name of an RPG sourcebook released by Decipher in 2005, focused entirely on the mirror universe.

The sourcebook was only released and distributed electronically. It provides players with a fairly complete history and scientific explanation of the mirror universe, much of which contradicts at least mildly with information given in other non-canon sources. It also gives information on how to create a mirror counterpart for an already existing character in the RPG.