This reference book includes comprehensive information on planetary systems, astrophysics, exobiology, and advanced civilizations based on the research of Carl Sagan, Michio Kaku, Nikolai Kardashev, and many others.

Atomik Add-Ons are designed with the basic assumption that gaming is 90% imagination and 10% rules. The universal concepts and flexible rules herein do not rely on a particular roleplaying game system, yet can be applied to all.