Anno 1800 Lan Multiplayer Fixed !!hot!! Jun 2026

If you desync, don't just reload. Have the host load the save in Single Player , let it run for 1–2 minutes, and then save again. Invite your friends to this new save.

The smell of stale coffee and overheating circuitry filled the small apartment. Outside, the rain lashed against the window, a fitting backdrop for the digital storm raging inside.

of every mod installed, as even a minor version mismatch will cause a desync. Clean Boot

Many desyncs (like the LR40 error) are resolved by ensuring UPnP (Universal Plug and Play) is enabled in your router settings. anno 1800 lan multiplayer fixed

Port forwarding is the process of telling your router to direct specific types of traffic to a particular device (your PC). For Anno 1800 , you need to forward the following ports for your PC's internal IP address:

Ensure your router allows traffic on UDP/TCP port 18000 , which is the official port for Anno 1800's multiplayer services. 2. Solve "Desync Detected" (LR40) and "Trajan" Errors

Anno 1800 uses specific ports to communicate. If your router’s firewall is too strict, you’ll never see your friends’ lobbies. UDP: 18000, 18017, 3074, 3478, 4379, 4380, 27015, 27016 If you desync, don't just reload

Under the tab, click Settings within the Performance block.

If the above methods do not work, you must ensure the game has proper access through firewalls and that your NAT type is open.

Historically, the Anno series thrived on local play, but fundamentally lacks a native, offline LAN mode. This design choice by Ubisoft forced all players through their online servers, making the experience dependent on the stability of Ubisoft Connect . Players have noted that if internet connectivity fails, the multiplayer option typically becomes unavailable, effectively ending any "local" sessions that aren't routed through the cloud. Common Fixes for Multiplayer Connectivity The smell of stale coffee and overheating circuitry

The question on everyone's lips is finally being answered:

Virtual Private Network (VPN) software or virtual network adapters (like those from VMware or VirtualBox) confuse the game’s engine on which network adapter to prioritize.