*[http://www.42entertainment.com/work/yearzero 42Entertainment's summary of the ARG]
*[https://www.youtube.com/watch?v=fhrnChYf23k Fan-made documentary on the ARG]
*[https://robsheridanwww.tumblr.com/postrobsheridan/45355542834/trent-reznor-london-2007-promo-photos-by-rob ''Year Zero'' promo photos by Rob Sheridan, part 1]
*[https://nineinchnails.tumblr.com/post/45437416550/robsheridan-part-two-continued-from-yesterday ''Year Zero'' promo photos by Rob Sheridan, part 2]
*[https://nineinchnails.tumblr.com/post/52064675258/halo-twenty-four-year-zero-2007-artwork-by ''Year Zero'' album imagery]