Valheim: Dedicated Server Basics
Valheim is a brutal exploration and survival game for 1-10 players. Hosting a dedicated server allows your group to play in a persistent world that doesn't pause when the host logs off.
1. Crossplay Support
Valheim fully supports Crossplay between Steam (PC), Mac, and Xbox. You must enable the `-crossplay` argument on your server to allow console players to join.
2. World Persistence
Time stops in valheim when no players are online. Food doesn't rot, and unauthorized greylings don't attack your base while you sleep.
3. Save Mechanics
The world is saved in two files: `.db` (Database) and `.fwl` (World Info). The server auto-saves every 20 minutes (default). Crashes can cause "Rollbacks".
Key Concepts for Admins
The "Ward" System
Unlike Rust, Valheim doesn't have "lock ownership" on doors by default. You must build a **Ward** to prevent non-friends from opening doors or chests. This is crucial on public servers.
Version Mismatches
Valheim is strict about versions. If the server is on 0.217.24 and your client is 0.217.28, you cannot join. Most updates are small patches. Always restart your server to fetch the latest Steam update if you can't connect.
Public vs Private
By default, servers are public.
Public: Listed in the Community Browser. Requires a password (minimum 5 characters).
Private: Hidden. Players must join via IP or "Join Code".
Performance Tips
Valheim is surprisingly CPU intensive due to how it handles "Zones" and "Instances".
- Limit Terraform: Excessive hoeing/leveling increases the "instance count" significantly, causing FPS drops for everyone in the area.
- Spread Out: Having 10 players in one castle will strain the network sync. Building separate villages is better for performance.
Skål! Host your Valheim server with Supercraft and use our automated mod installer to add 'Valheim Plus' for enhanced control over these mechanics.