Kessen

Kessen is a series of real-time strategy games for the PlayStation 2 produced by Koei and published by Electronic Arts. The first and third games take place in feudal Japan, similar to Samurai Warriors, while the second one takes place during a highly romanticized Three Kingdoms era, more similar to Dynasty Warriors.

Allusions

 * In Kessen II, Puma from Koei's Gitaroo-Man makes a cameo as one of Zhuge Liang's gadgets. Zhang Fei picks him up and marvels at how the toy can move by itself.
 * In Kessen III, super-deformed dolls of Da Qiao and Yukimura Sanada appear as two objects from Tokichiro's goods. Nobunaga says he'll take everything the merchant has and two soldiers run off with the dolls.