The Xbox 360 may not be doing too well in the land of the rising sun, but that didn’t stop Microsoft from making some killer announcements at the Tokyo Game Show. Besides the formal announcement of the exclusive Ninja Gaiden 2 (shock!) a handful of downloadable titles were announced for Xbox Live Arcade including Treasure’s critically acclaimed shooter Ikaruga and a new, high-definition version of Sega and United Game Artists’ Rez with full 5.1 audio! 1up has got the screenshots here, commence drooling!