Anno 1800 Lan Multiplayer Fixed [exclusive] (2026)

: Both players must have identical game versions. Use the "Verify Files" tool in Steam or Ubisoft Connect to ensure no files are corrupted. Mod Compatibility : If using mods (from platforms like ), ensure both players have the exact same versions

The LR05 error is particularly frustrating because it persists despite other connections working. This often indicates that the Ubisoft Connect services are unable to properly authenticate the multiplayer session.

Port forwarding requires a fixed target. Your PC's internal IP address (like 192.168.1.xxx ) must not change after a restart. Set a static IP using your operating system's network adapter settings. anno 1800 lan multiplayer fixed

Mastering Anno 1800 LAN Multiplayer: How to Fix Connectivity Issues permanently

Instruct every player in your party to repeat this step simultaneously. Increase Virtual Memory (Pagefile) : Both players must have identical game versions

The game's cross-platform multiplayer system is designed to support up to 16 players across PC, PlayStation, and Xbox, handling invitations, lobby creation, and game synchronization through Ubisoft's online infrastructure. While PC players from Steam, Epic Games Store, and Ubisoft Connect can all play together without issue—since all multiplayer services run through Ubisoft Connect regardless of where you bought the game—this architecture means there's no native "direct connection" option that bypasses the internet entirely.

: Ensure your NAT type is "Open." If it is "Unknown" or "Strict," check for interference from third-party security software like F-Secure or Kaspersky. You may also need to open relevant ports in your Windows Firewall 2. Resolving Desyncs and LR40 Errors This often indicates that the Ubisoft Connect services

Are all players using the (Steam vs. Ubisoft Store)? Share public link

Ensure everyone is on the same version (e.g., version 18.4). If using mods, every player must have the exact same mods installed and active. Even a single mismatched mod version will trigger a desync immediately. 3. Stability Fixes for Long Sessions

The bigger takeaway? Anno 1800 will never have a “plug-and-play” LAN mode like Age of Empires II or Command & Conquer . The game’s core simulation relies on deterministic lockstep synced via a session manager—rewriting that for pure P2P would require a sequel. But as of 2026, both Ubisoft and the modding community have provided robust, usable solutions.