Launch Ubisoft Connect on each PC, log in, then go offline (click your avatar → Go Offline). Note: You must have logged in online at least once on that PC before.
PC players on Steam, Epic, and Ubisoft Connect can all play together seamlessly. However, please note that there is no cross-play between PC and consoles (PS5/Xbox Series X|S). anno 1800 lan multiplayer link
Assuming your internet connection is stable, setting up a "LAN" game is relatively straightforward, though it has quirks. Launch Ubisoft Connect on each PC, log in,
Because there is no network lag over LAN, co-op feels nearly seamless. You can both pause, build, and issue commands simultaneously. It’s an excellent way to teach a new player or tackle a massive empire together. Launch Ubisoft Connect on each PC