OS-tanniversary 2004

OS-tanniversary 2004 is an event that ran on August 6, 2004 in the Japanese prefectures of Tokyo, Osaka, Kyoto, and Fukushima. It is the first OS-tanniversary event ever made. This event celebrates the 1st anniversary of ME-tan, whose first art was published on August 6, 2003 in the Japanese imageboard site Futaba Channel.

In this event, they advertised the GameCube title OS-Tan's 1st Anniversary Collection, alongside showing the OS-tan stuff done in 2004 (such as the Troubled Windows flash animation) and giving a shoutout to contributors at SNESmusic for the hard work they done on dumping and preserving SPC files of their games. A user-made game made with Kaite Tsukutte Asoberu: Dezaemon for the Super Famicom, named HebeDora KirBattle, was made, featuring bosses based on rivals such as characters from the Doraemon, Hebereke, and Kirby franchises, also being sold outside the small building as a save card made for use with the Save Manager peripheral.