As weird as this sounds a game called Crusader Kings has a really poor Crusading system. It could use some serious improvements. I have no idea why they have never attempted to add more to this portion of the game and make it more important. Some things could be added to make it a much more realistic and possible.
The crusades are way too uncoordinated, everyone will arrive at different times in very separate places just standing by while there is a giant death-stack destroying someone right beside them. Instead once the pope calls a crusade, a few months must be given for people to sign up for it. But instead of everyone leaving and arriving at whatever time they want the total levies of the crusaders should be divided up into separate large units, commanders of these armies will be chosen based on piety and martial level. If the crusade is successful the commander of the army which contributed the most should get the kingdom of Jerusalem the rest will either become vassals of that king or counts of a crusader state. If a king has the highest participation level he must nominate a family member.
The Byzantines should also fight in the crusades since Orthodox is still Christianity a feature that the game doesn't seem to get. There should be an exception for the Byzantines they should get to choose a special causus beli in it separate from the Catholic's, such as Christian re-conquest of Anatolia to help balance the strength against the Muslims.
The crusades are way too uncoordinated, everyone will arrive at different times in very separate places just standing by while there is a giant death-stack destroying someone right beside them. Instead once the pope calls a crusade, a few months must be given for people to sign up for it. But instead of everyone leaving and arriving at whatever time they want the total levies of the crusaders should be divided up into separate large units, commanders of these armies will be chosen based on piety and martial level. If the crusade is successful the commander of the army which contributed the most should get the kingdom of Jerusalem the rest will either become vassals of that king or counts of a crusader state. If a king has the highest participation level he must nominate a family member.
The Byzantines should also fight in the crusades since Orthodox is still Christianity a feature that the game doesn't seem to get. There should be an exception for the Byzantines they should get to choose a special causus beli in it separate from the Catholic's, such as Christian re-conquest of Anatolia to help balance the strength against the Muslims.