If you’ve been struggling to connect to friends in the same room, here is the exact checklist that worked for us:
The player with the strongest CPU and highest RAM capacity must host the game. The host handles all AI calculations and trading route updates.
Getting a smooth multiplayer session in Anno 1800 can feel harder than managing a five-island supply chain. Between desyncs, "LR40" errors, and NAT type issues, the 19th century isn't always stable.
Multiple computers on the same local network playing together via online multiplayer (using Ubisoft’s servers) but with very low latency. anno 1800 lan multiplayer fixed
Mastering Anno 1800 LAN Multiplayer: The Ultimate Fix and Setup Guide
High graphic loads can cause slower PCs to lag behind the host's tick-rate, triggering an LR40 error. Lowering the graphics settings on slower machines reduces this risk. Recommended Virtual LAN Alternatives
Several factors can contribute to ANNO 1800 LAN multiplayer issues, including: If you’ve been struggling to connect to friends
. Most players now report a "flawless" or "smooth" experience in sessions lasting several hours. Mandatory Online Check
ANNO 1800 LAN multiplayer issues can be frustrating, but by following these steps, you can resolve connectivity issues and get back to building and managing your city with friends. Remember to ensure you're running the latest game version, configure your network settings, adjust your router settings, and verify game files to ensure a stable connection. If issues persist, feel free to reach out to Ubisoft support for further assistance.
This design choice has drawn criticism from the community, but it's unlikely to change given the game's architecture. Anno 1800 uses server-side validation for achievements, save synchronization, and multiplayer matchmaking, making a true offline LAN mode improbable without a fundamental redesign. Between desyncs, "LR40" errors, and NAT type issues,
: If your PC has multiple adapters (like Hamachi or VirtualBox), the game may try to connect through the wrong one. Disable any secondary or virtual adapters to force the game onto your primary LAN connection.
Navigate to your Ubisoft Connect installation directory (Default: C:\Program Files (x86)\Ubisoft\Ubisoft Game Launch ). Locate the folder named cache and delete it entirely. Restart Ubisoft Connect and launch the game. 5. Fix the "LR40" Desync Error
| Step | Description | | --- | --- | | 1 | Ensure you're running the latest game version | | 2 | Configure network settings (disable firewall, port forwarding, IP address configuration) | | 3 | Configure router settings (UPnP, NAT settings) | | 4 | Adjust antivirus software settings (disable antivirus, add game exception) | | 5 | Verify game files | | 6 | Restart router and game |
Are you playing via a or an online LAN/VPN setup (like Hamachi)?