In overlord's mainland game, the code of exchanging money for grain is different in each region. For example, the money and grain codes in Liaodong are 6002 and 6004, Youzhou is 6022 and 6024, and Bingzhou is 6042 and 6044.

The History of the Three Kingdoms 2 Overlord the Mainland is a strategy game based on the history of the Three Kingdoms, which was released by Nanmenggong Company, the former overlord of the Red and White Machine, on 1992. The game surpasses the previous game in all aspects.