It will yes, because it is so moddable you could change anything at all so it has to change the checksum to turn off achievements and make MP games all require the same mods.Will this disable achievements like UI mods for Imperator?
Agree about the UI, and I'm still not sold on the 3D portraits.I seem to be in quite the minority here, but I for one find the new UI to be extremely lacking in character. It may be easier to navigate, for some at least, but the UI in CK2 added a lot of character to the game, the tops of the various windows (like council, military, religion etc.) being stained glass, the parchment popups, the massive national heraldic coat of arms on the capital province, they really gave you a sense of actually living in the middle ages. This UI, with all its darkness, plainness, sure, it may allude more to the reality of the middle ages for most people, but it takes away a portion of the magic that the CK2 possesses.