How much RAM does a Vault Hunters server need?

We set 8 GB. Vault Hunters is unusual in that the peak matters more than the average: the overworld base is light, but generating vaults is demanding, and several players running vaults simultaneously is the hardest work the server does. Eight gigabytes covers that comfortably for a group of around six. A larger or more active group should expect to size up further.

Why does the server stutter when we enter vaults?

Because the vault is generated at the moment you enter it, which is a burst of work rather than a steady cost. When two or three players open crystals at the same time those bursts land on the same tick. Staggering entries by a minute or two removes most of it. It is worth agreeing that as a house rule on a busy evening rather than chasing settings.

Why is our world folder so large?

Vault runs. Each one needs fresh space in the vault dimension, so unlike most packs the save grows with how much you play rather than how far you travel. A server that has run for a few months can have a big world folder with almost no overworld exploration behind it. Keep backups current and check disk usage occasionally rather than being surprised later.

Can I add mods to a Vault Hunters server?

You can, but be more careful than usual. The pack is built around its own progression, with custom loot, vault gear and generated vault structures, so a mod that changes loot tables, gear stats or world generation can break parts of that. Stick to cosmetic or utility additions, back up first, and give every player the identical jars or they cannot connect.

Do players lose progress when they die in a vault?

Dying in a vault ends that run, and the pack is designed around that risk: the tension of deciding whether to push for one more chest or leave with what you have is the point of the loop. Character level, skills and knowledge are not what is at stake, so a bad run costs you the crystal and its loot rather than your account progress.

Which client version do my players need?

Exactly the build the server runs, which for us is Vault Hunters Third Edition 3.21.7. Forge compares the full mod list when someone connects, so an older client is rejected outright rather than allowed in with problems. Because this pack updates fairly regularly, agree an update evening with your group rather than letting people update individually and lock themselves out.

Minecraft modpack · CurseForge

Vault Hunters Server Hosting

by Iskall85Team

ForgeMinecraft 1.18.2Java 17

How install works

One-click install from the Modpacks tab once your server is ready

Recommended RAM: 8 GB
Latest build: v3.21.7Jul 2026
Mod loader: Forge1.18.2
Downloads: 5.9MCurseForge

Vault Hunters is the closest modded Minecraft gets to a roguelike action RPG. The overworld is where you build, farm and prepare. The actual game happens inside vaults: timed, generated dungeon runs you enter with a crystal, loot as fast as you can, and leave before the clock beats you.

Everything else feeds that loop. You gain levels and spend skill points on abilities and talents, unlock mods themselves through knowledge points rather than having them handed to you, and build gear specifically to survive deeper runs. The long goal is collecting the 25 artifacts and beating the final boss, which is a genuine campaign rather than a vague endgame.

On a server this produces a rhythm other packs do not have. People spend an hour preparing together, then everybody goes into their own vault, then everyone comes back to compare loot and rebuild. It works particularly well for a group that plays on the same evenings, because the preparation is collaborative and the runs are personal. The pack is built by the Iskall85 team on Forge 1.18.2.

Hosting Vault Hunters

8 GB, and where it still gets tight

We set 8 GB. Vault Hunters is a pack where the ceiling matters far more than the average, which is why it sits higher than its mod count suggests. The overworld base is modest by modded standards, but vault runs are demanding, and several players running vaults at once is the heaviest thing the server will ever do. Eight gigabytes gives that peak room to breathe. If your group is larger than about six, or everyone reliably plays on the same evening, plan to go higher rather than assuming the figure holds.

Vault entry is a generation burst

A vault is built when you enter it. That makes opening a crystal a concentrated piece of work on the main thread rather than the gentle background cost of walking through terrain, and two people opening vaults in the same moment stacks those bursts together.

The practical fix is social rather than technical: on a busy server, stagger entries so people are not all opening crystals at once. It costs nothing and it removes most of the stutter that gets blamed on the host.

The save grows with play, not with exploring

Most packs grow their world when players travel. Vault Hunters grows it every time someone runs a vault, because each run needs space in the vault dimension. A server that has been running for months can therefore have a large save without anyone having explored much overworld at all. Keep an eye on backups and disk use, and take a backup before any pack update rather than after.

Java, mods and updating

Forge 1.18.2 means Java 17, which the installer selects for you. Vault Hunters is heavily scripted around its own progression, so be careful adding mods: anything touching loot, gear or world generation can interfere with the vault system. Update your players' clients at the same time as the server, since Forge rejects a mismatched mod list on connect.

RAM

8 GB for the peaks

The overworld base is light, but vault generation is demanding, so size for the busiest evening rather than the average.

Load

Vault entry is the spike

Vaults are generated as you enter, so several players opening crystals at once is the server's hardest moment.

Disk

The save grows per run

Every vault run needs new space in the vault dimension, so the world grows with play, not exploring.

How to install Vault Hunters on your server

1
Order the server
The button on this page preselects the RAM this pack needs. It is online about a minute after checkout.
2
Open the Modpacks tab and search Vault Hunters
In the panel's Modpacks tab, search for Vault Hunters and pick Vault Hunters Third Edition by the Iskall85 team, then choose build 3.21.7.
3
Press install and wait
The panel downloads the server pack, installs the loader and the right Java version, then restarts.
4
Join with the same build
Everyone installs the same pack build in their launcher, then connects to the address on the Overview tab.

Available builds

Build	Minecraft	Loader	Released	Installable
v3.21.7	1.18.2	Forge	Jul 28, 2026	Installable
v3.21.6	1.18.2	Forge	Jul 25, 2026	Installable
v3.21.5	1.18.2	Forge	Apr 19, 2026	Installable
v3.21.4.1	1.18.2	Forge	Apr 9, 2026	Installable
v3.21.4	1.18.2	Forge	Apr 8, 2026	Installable