Anno - 1800 Lan Multiplayer

The LAN multiplayer mode in Anno 1800 offers several benefits, including:

You can use mods in multiplayer, but must have the exact same mod files and versions installed. The game will notify you if there is a mismatch with the host's setup. 💡 Key Strategies for Success Newspapers | Anno 1800 Wiki | Fandom

To ensure a smooth experience, your setup needs to meet both the game's hardware and network demands.

Despite the lack of a dedicated LAN mode, you can still play with people in the same building by using the standard online multiplayer menus:

Select the "Multiplayer" option from the main menu. anno 1800 lan multiplayer

Follow these instructions carefully to get your local multiplayer session up and running.

Since we are essentially running an online game over a local network, the steps mirror setting up an online game, but with some specific optimizations.

| Error / Issue | Possible Cause | Common Fixes | | :--- | :--- | :--- | | | Ubisoft Connect can't properly detect your network settings, often due to router or firewall restrictions. | Restart the game and Ubisoft Connect. Forward the required ports (UDP 18000) in your router settings. | | Connection / LR05 Error | A mismatch in game data or a temporary server issue. | Check Ubisoft servers for outages. Verify the integrity of your game files (Ubi/Steam) and ensure all mods match. | | LR40 Error | Most common when Steam is used for invites. | Use Ubisoft Connect for invites only . Ensure no one is using a VPN/proxy. | | Multiplayer Grayed Out | Ubisoft Connect is set to Offline. | Change your Ubisoft Connect status to "Online". A full PC restart can also help. | | Lag / High Ping | Weak Wi-Fi signal or background downloads. | Use a wired Ethernet connection for a more stable signal. Limit other devices on the network from using heavy bandwidth (video streaming, large downloads). |

Toggle or "Friend Game" (Friends can join without an invite). Modding in Multiplayer The LAN multiplayer mode in Anno 1800 offers

Each player must own Anno 1800 on Ubisoft Connect, Steam, or Epic Games.

To get started with Anno 1800 LAN multiplayer, players will need to ensure that their computers are connected to the same local network. From there, they can launch the game, create a new game or join an existing one, and select the LAN multiplayer option. The game will guide players through the process of setting up a LAN game, making it easy to get started.

Firewalls are not blocking the game's connection to Ubisoft services.

: You'll likely see your NAT type status in the game menu. Ideally, you want it to say "Open." If it says "Unknown" or "Moderate," it can hinder your ability to connect to or host games. Port forwarding, enabling UPnP, or disabling IPv6 on your network adapter are all troubleshooting steps that can help resolve NAT issues. Despite the lack of a dedicated LAN mode,

: It reduces stress. One player can focus entirely on managing production chains in the Old World, a second player can manage expeditions and the New World, while a third handles naval warfare and trade routes. Versus Mode (The Competitive Approach)

Before we dive into the technical steps, it's critical to understand how the game is built. While many classic LAN games from the 2000s allowed for a direct, offline connection between PCs, Anno 1800 is a modern title that relies heavily on the infrastructure.

As of June 2026, for offline play. All multiplayer sessions require a stable internet connection through Ubisoft Connect to manage player profiles, synchronization, and save game data.

| Problem | Likely Cause | Solution | |---------|--------------|----------| | Game not visible in lobby | Firewall blocking UDP ports | Allow Anno1800.exe and Ubisoft Connect in Windows Defender / third-party firewall. | | “Failed to join session” | Different game versions or DLC mismatch | Verify all players update game and disable mods temporarily. | | Constant desyncs | Mod conflict or one player has corrupted cache | Disable all mods; clear %USERPROFILE%\Documents\Anno 1800\cache . | | High latency despite being on LAN | PC is using wireless, or router is overloaded | Use Ethernet; reduce other network traffic (e.g., video streaming). | | Disconnect after 10 minutes | Internet drop on any player’s side | Check stability of each player’s internet – even LAN mode requires online. |