I make a map in worldbuilder and change whatever i want in the map ( i can also choose a new civ - Mongols for example ), i then save that map and name it TZ, exit game and copy that map from woldbuilder into single playerīut when i enter game again and go to single player - create game - advanced options and choose the *TZ ruleset*, it automatically removes the civ that i have choosen ( if its a new one like mongols ), or it won't show all the new civs on the pick list I used those *old* TZ files and the same method but there is this problem with the *new* civs. I have installed the game again now as i have some spare time to mess around, with the Rise and fall expansion and all DLC's and so on. i played civ 6 a couple of years ago and found the *TZ solution to be able to make a map with worldbuilder and then load and play it in single player and it was all working fine