The multiplayer experience in Anno 1800 has stabilized significantly following the end of its active development cycle in 2023, though it is not without occasional technical hurdles. Connectivity & Stability Desync Issues
Aggressive security software often blocks the peer-to-peer data packets needed for Anno 1800 sessions.
Ensure Ubisoft Connect is running in online mode initially. The game requires an active handshake with Ubisoft servers to authenticate ownership before opening local lobbies. anno 1800 lan multiplayer fixed
Scroll down and click the button under the "Synchronize your clock" section. Ensure your Time zone matches your actual location.
It is important to understand the distinction: unlike some classic strategy games that support direct IP connections via a local server, Anno 1800's multiplayer always routes through Ubisoft's servers. Therefore, a "LAN game" in the traditional sense—launching an offline server and having other computers connect to a local IP address—is not a feature the game officially supports. The multiplayer experience in Anno 1800 has stabilized
Desynchronization occurs when the simulation state on one computer diverges from the host computer. Fix this problem by adjusting your Windows virtual memory and system clocks. Synchronize Windows Time
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Type the following commands one by one, pressing Enter after each: ipconfig /release ipconfig /renew ipconfig /flushdns netsh int ip reset netsh winsock reset immediately after the final reset. Fix 6: Resolve the LR40 Desync Error
A microscopic discrepancy in system time clocks can break peer-to-peer data streams. Right-click the clock in your Windows taskbar. Select .
If your router blocks the specific ports used by Anno 1800 and Ubisoft Connect, players will fail to join the lobby, or the game will disconnect within minutes of launching. You must access your router's gateway configuration page to open these ports. Ports to Open for Anno 1800
: A frequent issue involves "Out of Sync" errors. A known community fix involves all participating players deleting the contents of the desync folder located in the Windows user directory for Anno 1800 before restarting the session.