According to Matt Casamassina's blog on IGN, an unnamed developer was working on a Nintendo DS version of "Halo". Casamassina wrote that "It (the developer) contacted Microsoft and got the ball rolling on a very unlikely project: Halo for Nintendo DS. Needless to say, there were many egos involved and unfortunately because of some issues that I won't detail, the project was eventually cancelled." The post then goes on to say that the DS version didn't look that much different than the Xbox version. "Think Metroid Prime Hunters but with a Halo facelift."