Why can''t my friend join my Valheim server via Steam invite?

If your friend is unable to join your Valheim server via Steam invite, there are several potential causes and solutions to explore. Valheim''s multiplayer functionality relies on a combination of Steam''s networking features and the game''s server settings. Understanding these mechanics is key to resolving connection issues.\n\nFirst, ensure that both you and your friend are using the same version of Valheim. Updates are frequent, and mismatched versions can prevent players from joining. To check, open Valheim and look at the version number in the bottom-right corner of the main menu. If one of you has an outdated version, restart Steam to trigger an update.\n\nNext, verify that your server is set up correctly. If you''re hosting a local server (non-dedicated), ensure that your game is set to ''Start Server'' and that the ''Community Server'' option is unchecked. This allows Steam invites to function properly. If you''re using a dedicated server, confirm that the server is running and that the IP address or server name is correctly configured. Dedicated servers require port forwarding (default port: 2456-2458) to allow external connections.\n\nFirewall and antivirus settings can also block Valheim''s multiplayer functionality. Ensure that Valheim is added to the exception list in both your firewall and antivirus software. On Windows, you can do this by navigating to ''Windows Defender Firewall'' and allowing Valheim through both private and public networks. Similarly, check your router settings to ensure that the necessary ports are open for Valheim.\n\nIf the issue persists, try using the ''Join Game'' feature instead of a Steam invite. Open Steam, go to your friend''s profile, and click ''Join Game.'' This bypasses some of the potential issues with Steam invites. Alternatively, you can share the server''s IP address directly. For local servers, this is your public IP address, which you can find by searching ''What is my IP'' in a browser. For dedicated servers, use the server''s IP or domain name.\n\nAnother common issue is NAT (Network Address Translation) type conflicts. If either you or your friend has a strict NAT type, it can prevent connections. To resolve this, enable UPnP (Universal Plug and Play) on your router or manually configure port forwarding. You can check your NAT type in Steam by going to ''Settings'' > ''Voice'' and looking at the NAT type listed at the bottom.\n\nFinally, if none of the above solutions work, consider using a third-party server hosting service. These services handle all the technical aspects of server hosting, including port forwarding and updates, making it easier for friends to join. Popular options include G-Portal, Survival Servers, and Host Havoc.\n\nIn summary, troubleshooting Valheim multiplayer issues involves checking game versions, server settings, firewall configurations, and network settings. By following these steps, you should be able to resolve most connection problems and enjoy the game with your friends. Remember to communicate with your friend throughout the process to ensure both of you are on the same page.