Can you mod the game so a human can become an AI's vassal?

[MasterofLlamas]

And, if so, how would one do that?

 

[Wessel V1]

It is possible to try it in WB, in the relations screen. It's great fun, so try it out. However, I don't know how to do this in de diplomacy screen, but it would probably require SDK changes.

 

[Zebra 9]

Its an SDK change. I have the code for it, I think someone released it.

 

[Tholish]

I made a scenario in which Ghandi starts as a vassal of England, put it in public maps, then started playing as Ghandi. Every turn I got a popup asking me if I wanted to keep giving a bonus to England or declare war on them, but otherwise played normally. When I finally, declared war, the English garrison force of redcoats meekly WALKED back to England (or rather actually to Egypt, which was also held by the English), walking past War Elephants and undefended cities, merely stopping to pillage a little.

 

[Cybah]

It's possible while you are under AI Autoplay.