| Issue | Cause | Solution | |-------|-------|----------| | Game does not see LAN host | Broadcast packets blocked | Use Direct IP Join instead of scanning LAN | | Connection times out | Firewall blocking Hamachi or Grim Dawn | Temporarily disable firewalls for testing; add exceptions permanently | | High latency/ping | Hamachi relay server in use | Upgrade to paid Hamachi (direct tunnel) or use ZeroTier | | Players drop after joining | Mismatched game versions | Ensure all players have same game version and DLCs enabled/disabled identically | | Hamachi IP changes on reboot | Default DHCP | Set static Hamachi IP via Hamachi preferences → Settings → Static IP (if available) |
Before we dive into the technical setup, you must understand the problem. Grim Dawn uses direct IP-to-IP connection. It does not use dedicated servers (outside of community mods like GD Multiplayer Fix). This means your computer tries to talk directly to your friend's computer. grim dawn hamachi full
In modern networking, this is problematic due to: | Issue | Cause | Solution | |-------|-------|----------|
Hamachi solves this by creating a Virtual Private Network (VPN). It tricks your computer and your friends' computers into thinking they are all sitting on the same local router (typically the 25.0.0.x range). To the game, you aren't connecting over the chaotic internet; you are connecting locally. Hamachi solves this by creating a Virtual Private
Grim Dawn supports direct IP connections and LAN play. Hamachi helps when:
Important: Hamachi adds network overhead. For best results, all players should have stable internet (at least 5–10 Mbps upload/download).
Cause: Two players have the same Hamachi IP.
Fix: In Hamachi, right-click your name > Status details. If two people have 25.10.45.1, leave the network and rejoin. Let Hamachi assign a new one.