A world to play role playing games in, by David Pulver, created for the GURPS system.

In it, magic returns to the world when Oppenheimer's words, "I am become death, destroyer of worlds" unwittingly completed a necromantic ritual, in combination with the detonation of an atomic bomb. The world proceeds on an otherwise close parallel of our Earth, with some differences, such as the sentient penguins with a hive-mind in Antarctica. To say nothing of the Stalin lich.