According to players over at Gamefaqs, Tecmo has quietly added a patch update for Ninja Gaiden 2 on the Xbox 360. Not that anyone is complaining though - nonexistinghero at gamefaqs indicates that the patch seems to have fixed several of the game's previous bugs.

As the forum member elaborated:

• Speed karma board glitch = solved
• You can now get on the Speed challenge board. I'm ranked 5th, although it wasn't a real speed run... it was just my Tonfa run.
• Game breaking glitches = most, if not all, of them seem to be solved
• Karma farming = solved, can't be done anymore
  

Aside from those fixes, nonexistinghero notes that Ninja Gaiden 2's slowdown and an issue regarding enemies getting stuck haven't occured since the patch update. Chapter 10's glitch is still there however, as are the game's loading time issues. Ninja Gaiden 2's *ahem* ninja-patch is available as an auto-update. Stick around in case Tecmo gives any official word on what exact issues this patch update is intended to fix.

Buy: [Ninja Gaiden 2]