上海アリス幻樂団
is the twelfth main game of the "Touhou Project" scrolling shooter series, by dōjin game circle Team Shanghai Alice. The game was released at the 76th Comiket on August 15, 2009, and then followed by a retail release on September 11, 2009. "Undefined Fantastic Object" was the first "Touhou" game to introduce colored power-ups, which reward the player with extra lives, points and bombs when collected, a gameplay mechanic that would be used in multiple games later on in the series.