is a downloadable video game developed by Japan

Japan

Japan is an island nation in East Asia. Located in the Pacific Ocean, it lies to the east of the Sea of Japan, China, North Korea, South Korea and Russia, stretching from the Sea of Okhotsk in the north to the East China Sea and Taiwan in the south...

ese developer Grezzo

Grezzo

Grezzo is a Japanese video game developer. It was founded in December 2006. Koichi Ishii, known for his work on the Mana series of games by Square Enix, signed on as CEO and president of the company in April 2007...

 and was released for WiiWare

WiiWare

WiiWare is a service that allows Wii users to download games and applications specifically designed and developed for the Wii video game console made by Nintendo. These games and applications can only be purchased and downloaded from the Wii Shop Channel under the WiiWare section...

. It was first revealed at Nintendo

Nintendo

is a multinational corporation located in Kyoto, Japan. Founded on September 23, 1889 by Fusajiro Yamauchi, it produced handmade hanafuda cards. By 1963, the company had tried several small niche businesses, such as a cab company and a love hotel....

's Conference on October 2 2008 as a retail game. It was revealed for North America at E3 2009 also for retail. As of July 23, 2010, Line Attack Heroes has been announced for WiiWare instead and it was released on July 27, 2010 in Japan.