The Battle for Mata Nui was a online game, set during the invasion of the Bohrok swarms. While it was originally intended to be released in early 2002, technical problems led to a delay in its release online until early 2003. Its first appearances were on the Bohrok Swarms Promo CD and Toa Nuva Promo CD in early 2002 along with the release of the Bohrok sets.