Anno 1800 does not feature a dedicated, offline LAN button. Instead, Ubisoft utilizes an online peer-to-peer (P2P) networking model architecture.

Because there is no offline LAN mode, players must use the following method to simulate LAN play:

However, "playing together in the same room" is still very much alive, provided both players have internet access.

: To play in a local network setting across the internet or within the same house, players often use third-party virtual LAN solutions (like Hamachi or Radmin VPN) if they wish to bypass certain regional server constraints, though standard multiplayer invites are the intended method.