Another bit of news that has been part of Major Nelson’s announcement of the XBLA schedule for the next few weeks is, that Shinobi will be off 50%! 200 Microsoft points are a great price for the arcade classic! You can grab it for cheap from November 8th to November 14th! Certainly a good way to warm up for the new Nintendo 3DS game!
[Source: Major Nelson Blog]
That looks like the Master System version (I preferred the upgraded weapons system, especially the Manrikugari Chain!)