XNA Game Studio 3.1（日本語版） http://creators.xna.com/en-US/japan/ http://www.xbox.com/ja-JP/press/release/20090709.htm http://www.famitsu.com/game/news/1225715_1124.html http://game.watch.impress.co.jp/docs/news/20090709_300986.html 200…