This is the gold standard for LAN parties. It works even without an internet connection, supports up to 8 players, and has lower RAM overhead than the official method. No desyncs reported in 2026 tests.
Add your friends via their Ubisoft nickname in the Ubisoft Connect app .
Corrupted network caches prevent Ubisoft Connect from verifying local lobby certificates.
When connectivity drops or servers undergo maintenance, multiplayer sessions instantly disconnect. Resolving these connection drops requires configuring local network priorities and bypassing external bottlenecks. Steps to Fix LAN and Multiplayer Connectivity Issues
Ensure both Anno 1800 and Ubisoft Connect are allowed through your Windows Firewall. For local play, verify both PCs are on the same subnet (e.g., both 192.168.1.x) and ideally using IPv4 rather than IPv6. Resolving Synchronization & Lag