UserJoy Technology Co., Ltd. (Chinese: 宇峻奧汀科技股份有限公司; pinyin: Yǔjùn Àotīng) is a Taiwanese video game development and publishing company.

Its 2003 Fantasia Sango series received Gamestar Awards when it was released, and outside China, Hong Kong, and Taiwan, was published by Nihon Falcom.

[1] In 2007, Userjoy jointly developed Angel Love Online PLAYSTATION 3 version with Q Entertainment Inc., to provide the first PS3 MMORPG.

UserJoy's Field of Honor is a casual online game launched in January 2008.

[8] In 2011, UserJoy began producing the free-to-play MMO version of the Ninety-Nine Nights along with Q Entertainment.