I want to do the following modifications and I think I can probably do them pretty easily via the xml files, but wanted to see what everyone else thought: 1. Bldg founds religion - whoever builds wonder X first will be the founder of X religion 2. Make it so that there are no 2 religions in any city, i.e., a 2nd religion can't join the city. There's a civic that makes it so that no non-state religion spreads... but I want to make this a fact even without having to have that civic. Once a religion is in a city, that religion sticks. 3. Defense bonuses are calculated by population or is a function of population 4. Cannot build city on a tile that has a resource (whether visible or hidden) 5. Tiles improve as a function of technology 6. Buildings and units can be unique for multiple countries... e.g., the Hwacha is unique to Korea AND Japan Are any of these too crazy? Do you think I would need to get into the python code for any of them? If I do have to do the python code, does that require recompiling anything (I'm more comfortable with editing the XML code). thanks!