Tutorial tells you to do this and do that but doesn't actually explain much of the intricacies. Here I will try to explain some things and tell you what is worth or not. 

基于ver1.1.25繁中版  

信长之野望和三国志和WP等涩泽光组的游戏PC版历来都不支持手柄，这次光荣奇迹般的支持手柄了，而且是为STEAM DECK独占手柄支持，现在交大家如何启用手柄支持！ The PC versions of Nobunaga's Ambition, Romance of the Three Kingdoms, and the WP series have never supported controllers in the PC version of Shibusawa's games. This time KO