Ragnarok Online
Doujin soft are typically available in "demo" or "trial" ( "taikenban") form for free on the internet, with full versions available for purchase. One game, French-Bread's brawler "Ragnarok Battle Offline", a homage/spoof of the MMORPG "Ragnarok Online" so impressed Gravity Corp., the original game's designers, that it has been given an official release outside Japan.