it's a mod with a persistent multiplayer server that keep track of all your stats/levels/equipment/gold. you start off as a pile of **** and slowly work your way up, gaining experience and increase your weapon skills to allow better performance against other players, it's like a Mount and Blade MMO PvP server, like having your single player character on a multiplayer server. Honestly, it was a great concept, I loved it, except for the fact that if you had someone who was not only good at the game, but also the advantage of playing/grinding alot, they were able to significantly dominate the server over everyone else. Granted, for a concept like that, you are bound to have low vs high skill/level/stat/equipment differences, otherwise there is no fun in it. But I do think if someone makes it for bannerlord, there should be additional considerations for some sort of a matchmaking/level/ranking match up to account for the crazy level/skill gap that was there in cRPG. Of course that's asking a lot for a mod, but maybe if TW sees the potential in it, they can actually turn it into an official gameplay mode for multiplayer.