Realised I already have a key from the betaIt is very buggy. You'll want to transfer saves from the host to your playing buddy every 10 turns or so. Also DO NOT save while in the pre-battle screen on the campaign map. You will not be able to load from that point onwardsBut it's soo good to play with the massive scale that is ETW. You can use mods too, just as with normal mp; both have to have it, ofc.