Valheim Thunderstore Mods on Dedicated Servers 2026
Thunderstore is the easiest way for most Valheim communities to find mods, but a dedicated server still needs a careful setup. A modpack that works perfectly in single player can fail on a server if versions drift, clients miss required files, or the world is already overloaded with entities.
This guide explains how to plan a Valheim Thunderstore server in a way that stays joinable, stable, and easy to maintain.
How Thunderstore fits into Valheim hosting
Most Valheim server mods use BepInEx. Thunderstore is the mod directory and manager ecosystem many players use to install those mods. On a dedicated server, the important question is not just "can I install this mod?" It is whether the mod must run on the server, the client, or both.
Common categories:
| Mod type | Server install needed? | Client install needed? |
|---|---|---|
| Admin tools | Usually yes | Sometimes |
| Gameplay systems | Yes | Usually yes |
| New items or crafting | Yes | Yes |
| UI only mods | No | Yes |
| Visual client mods | No | Yes |
If a gameplay mod changes items, enemies, skills, crafting, or world behavior, assume every player needs the same version.
Start with a clean mod profile
The safest approach is to build one clean Thunderstore profile for the server. Add a small group of essential mods first, test joining, then add more in batches.
Avoid building your server from a personal profile that already has dozens of quality-of-life mods. Personal profiles often include client-only tools that do not belong on the server and make troubleshooting harder.
Good first batch:
- BepInEx pack
- Server-side admin tool
- Configuration sync mod if your pack requires it
- One or two core gameplay mods
After that, add content mods slowly and document every change.
Keep versions locked
Valheim updates can break mods. Mod authors also push updates that change config formats. For a live community, version control matters more than always being on the newest file.
Before updating a modpack:
- Back up the world save
- Back up
BepInEx/config - Save the current mod list and versions
- Test the update on a staging server or copy of the world
- Tell players when they need to update their client profile
The most common modded Valheim support issue is not weak hardware. It is one player using a different mod version from everyone else.
Watch world size and entity count
Valheim performance is strongly affected by loaded instances. Big bases, terrain edits, farms, portals, and modded build pieces can all increase server work. Mods that add creatures, automated production, or large structures can make this worse.
Signs your server is becoming overloaded:
- Players rubberband near large bases
- Server save operations take longer
- Login is slow after world load
- CPU spikes when several players are in different zones
- Backups become noticeably larger over time
If that happens, review the mod list before upgrading hardware. A single automation or spawn mod can do more damage than ten harmless quality-of-life mods.
Recommended RAM for modded Valheim
Small vanilla Valheim servers are light, but modded servers need more room. Plan around the world age, player count, and mod type.
| Server style | Suggested RAM |
|---|---|
| Vanilla friends server | 4 GB |
| Light BepInEx quality-of-life pack | 6 GB |
| Modded survival with new content | 8 GB |
| Large long-running modded world | 12 GB or more |
CPU still matters. Valheim benefits from strong single-core speed, especially when many zones are loaded at once.
Client instructions matter
Your players need a simple install path. Put the Thunderstore profile code, mod list, and update rules in your Discord. Include exactly which profile to use and when to update it.
Helpful Discord message format:
- Install Thunderstore Mod Manager or r2modman.
- Create a Valheim profile from the server code.
- Do not update mods until staff says so.
- If you cannot join, send a screenshot of your profile version.
That one message prevents a lot of late-night support work.
Hosting a Valheim modded server
For a small modded group, start with enough RAM for the pack and room for world growth. For public servers, prioritize DDoS protection, backups, and fast NVMe storage.
Space-Node offers Valheim server hosting from a Netherlands datacenter with Ryzen CPUs, NVMe storage, DDoS protection, and simple upgrade paths for growing worlds.
Bottom line
Thunderstore makes Valheim mod discovery easy, but a dedicated server needs discipline. Lock versions, test updates, keep client instructions clear, and choose hardware based on the actual modpack instead of the vanilla game.
Building a modded Valheim world? View Valheim hosting plans with enough room for BepInEx mods, backups, and long-running worlds.
