Well, according to "the Internet" The Legend of Sword and Fairy is the most popular chinese RPG ever made, I'm very interested to check that out.
Bregalad, if you're nitpicking at least do it right
Mandarin (and cantonese etc.) are different SPOKEN languages. What matters here is if they translated into traditional or simplified chinese WRITTEN languages. Today, most spoken languages which we summarize under "chinese" are written in the simplified chinese characters as enforced by the communistic party ruling mainland china. Before that they used what is now called traditional chinese. In Hong Kong, where people speak cantonese, they still write in these traditional characters, not sure about Taiwan and Singapore.