This game is written by racist, national socialist, and convicted murderer Varg Vikernes.
Several minor versions (2, 2.1, 2.2, 2.3, 2.4, 2.5 and 2.6) were produced in rapid succession through 2015. These versions include minor corrections. The publisher site provides errata document downloads (one-page PDFs) for the versions. The differences are minor: the publisher continued to provide version 2.2 through direct sales even as Amazon provided version 2.5.