Addiction is a mental, physical, and mundane disadvantage. It is described in Basic Set, p. 122. It is referenced in Fantasy, p. 132, on nympholepsy; Magic, p. 92, in the description of the Relieve Addiction spell; Space, p. 220, on addiction to virtual reality, psionic contact, or direct pleasure stimulation; and Thaumatology, p. 63, on addiction to magic, and p. 94, on addiction to spiritual energies.