The Law of Darkness is a "world-hopping adventure"[1]in which the heroes oppose Darkseid,[1] who is seeking out the Anti-Life Equation, aided by Desaad and Granny Goodness.

[2] The heroes also have to contend with Acidic Blobs, Slow-Down Gas, the Deathmaker robot from Studio X, Para-Demons, Bug Warriors and a Devolution Cube.

[2] Both Lawrence Schick and Allen Varney suggested this adventure is only suitable for the high level characters of the DC Heroes universe known as New Gods.

[2] The Law of Darkness was written by Scott Paul Maykrantz, and was published by Mayfair Games in 1990 as a 48-page book with a cover by Paris Cullins and Mike DeCarlo, and interior art by Maria Cabardo, the DC Comics Staff, Bob LeRose, and Mark Maykrantz[1] In Issue 165 of Dragon, Allen Varney felt that, like other DC Heroes adventures, "once again the adventure's ending falls slightly flat, but getting there should be a roller coaster ride worthy of the original Jack Kirby stories of the New Gods."

Alloway liked the flowchart of encounters at the start of the adventure to make the gamemaster's life easier, and called the production values "high quality, both in terms of esthetics and unique flavoring elements."