A version of legendary Bungie shooter Halo was "completely up and running and fully playable" on Nintendo DS, according to IGN's Matt Casamassina.
In a post in his official Blog, Casamassina says that Halo DS was the brain child of an unnamed publisher other than Microsoft, but was eventually cancelled due to the "many egos involved" and other issues not mentioned in the post.
Even more amazing is that long-named journo also claims to have played a build of Halo DS, and describes it as "Metroid Prime Hunters but with a Halo facelift."
"I had the opportunity to run through the beginning beach area and noted while playing that it looked like Xbox Halo except on DS, it was running fast, and the control was responsive." He continues: "the trademark Halo music even played out of the tiny speakers of Nintendo's handheld. It is really, truly a damned shame that certain publishers couldn't make this happen."