The Legend of Three Kingdoms (pinyin: Sān Guó Qún Yīng Zhuàn) is a video game series originally developed by OdinSoft, later by UserJoy Technology. The series includes seven PC-based single-player titles and three online and one mobile titles, which have been released in China, Japan, South Korea, Russia, the United States, and South Asia. The backdrop for the plot comes from Luo Guanzhong's 14th century novel, Romance of the Three Kingdoms.