In August 2011, IDW released a one-shot issue called Godzilla: Kingdom of Monsters 100-Cover Charity Spectacular. The issue featured all 100 of the unique covers of the comic book store-smashing variants of issue #1 via a cover gallery. Proceeds from the sale of the issue went to benefit the International Medical Corps for tsunami relief in Japan. In September 2011, they began collecting the series as a three-volume trade paperback series. In July 2019, the entire series was collected as a deluxe trade paperback. From May 2012 to May 2013, IDW published a second ongoing series, simply called Godzilla. The series ran 13 issues. In November 2012, they began collecting the series as a three-volume trade paperback series. In April 2014, the entire series was collected as a deluxe trade paperback called Godzilla: History's Greatest Monster. From June 2013 to June 2015, IDW published a third ongoing series called Godzilla: Rulers of Earth, which ran 25 issues. They began collecting the series as a six-volume trade paperback series in December 2013. In June 2016, they started to recollect the series as a two-volume deluxe trade paperback series, with the first volume called Godzilla: Complete Rulers of Earth. In August 2019 the second volume, called Godzilla: Complete Rulers of Earth 2, was released. Miniseries Outside of the ongoing main series, IDW has also published seven five-issue miniseries. They first published a five-issue miniseries called Godzilla: Gangsters & Goliaths from June – October 2011. The miniseries was then collected as a trade paperback in November 2011. A second five-issue miniseries called Godzilla: Legends was published from November 2011 – March 2012. The miniseries was then collected as a trade paperback in June 2012. A third five-issue miniseries called Godzilla: The Half-Century War was published from August – December 2012. The miniseries was then collected as a trade paperback in May 2013. The miniseries was then collected again as a hardcover book, with additional artwork, in July 2015. In October 2016, issue #1 was reprinted as Godzilla: The Half-Century War – Greatest Hits #1. A fourth five-issue miniseries called Godzilla: Cataclysm was published from August – December 2014. The miniseries was then collected as a trade paperback in March 2015. A fifth five-issue miniseries called Godzilla in Hell was published from July – November 2015. Issues #1 and 2 of the miniseries both went into a second and third printing, while issue #3