How to install XKCD?
XKCD is available in the official Kodi repository which is included by default in Kodi. You can install this addon by going in Kodi to System >> Settings >> Addons >> Get Addons >> XBMC.org Addons or Kodi.tv Addons
About SuperRepo and XKCD
SuperRepo does not maintain XKCD. We only provide an automated index for Kodi users to have easy access to XKCD and other addons for Kodi. We are not affiliated with the developers (phil65) and do not provide help for this particular addon.