Klei Entertainment teases XBLA 'Mark of the Ninja' with text adventure
Due this summer, Mark of the Ninja is a side-scrolling "stealth ninja game" with heavily stylized graphics, that involves reticle-targeted ninja devices like a grappling hook, caltrops, and throwing knives. Judging by the clip (and the preceding text game), the goal is to set up traps for unsuspecting enemies, and kill them undetected.
The video suggests that Mark of the Ninja is a Microsoft Studios-published game, which, combined with the release window, makes it a very likely candidate for a Summer of Arcade promotion.