Set up a Vault Hunters modpack server

Vault Hunters is an RPG modpack built around The Vault, a procedurally generated dungeon. Players level up, learn talents and abilities, and work towards collecting 25 artifacts to unlock a final boss. This guide installs the Third Edition on your server from the Modpacks tab and shows how players join.

Checked against Vault Hunters Third Edition 3.21.7 (Minecraft 1.18.2, Forge), October 2026.

What it needs

• A server with enough RAM. The pack's page tells players to allocate 8 GB (8192 MB), and we recommend 8 GB for this pack too, with 6 GB as the minimum. Check the plans on Minecraft hosting and choose one with at least 8 GB.
• The CurseForge source. The pack is published on CurseForge as Vault Hunters Third Edition for Minecraft 1.18.2 on Forge. The Modpacks tab can search CurseForge, and the pack has a dedicated server pack, so the panel installs it as a ready-made server.
• Java 17. The panel picks Java for 1.18.2 itself, and you do not choose it.
• The pack on every player's computer. It is a Forge modpack, so players install Vault Hunters in the CurseForge app. That is how the pack's own page tells players to start.

Install it on your server

Installing a modpack reinstalls the whole server, so do this on a new server or one you can wipe. The panel's own note says it reinstalls your entire server with the pack, and you confirm first.

1. Open the Backups tab and click Create backup.
2. Open the Modpacks tab and choose the CurseForge chip in the source chip row at the top of the tab.
3. Search for Vault Hunters and find Vault Hunters Third Edition. The pack's page also mentions a skyblock variant called Sky Vaults, which this guide does not cover.
4. Click Install on the row. A window titled Install Vault Hunters Third Edition? opens.
5. Leave Take a backup first ticked. Tick I agree to the Minecraft EULA if it appears, and tick Start the server when it's ready if you want it to boot straight away.
6. Press and hold Install and reinstall until it fills, then watch the Console tab until the install finishes. Allow some time for it.

The install sets up Forge for 1.18.2 itself, using the build the pack's manifest.json pins, 40.3.11. If you did not tick the start option, open the Console tab and click Start. The server is up when the console prints a line containing For help, type. On the 8 GB Netherite plan the first start took about 73 seconds, so give it a minute or two.

Join the server

1. In the CurseForge app, find Vault Hunters Third Edition and install it. The pack's page says to set the app's Allocated Memory to 8192 MB in its Minecraft settings.
2. Pick version 3.21.7. It is the file the server installs and the newest one at the time of writing.
3. Start the pack and add your server in the multiplayer list with the address shown in the panel's left rail. Connect to your server for the first time shows where.

Make yourself an operator with Operators in the Players tab (Whitelist players and set operators) if you want to use commands.

Updating later

A CurseForge pack never gets an Update to button on the Modpacks tab, and the card can read Up to date even when the author has published a newer file. To move to a newer version, take a backup, press Remove modpack, then install the new version. Remove keeps your world and player lists, but the new install replaces them unless you tick Keep my world, settings and player lists in its window.

Each Remove modpack and each install with Take a backup first ticked makes its own protected backup. On a plan with two backup slots, a manual backup on top of those leaves no slot free, and the install stops with the message Couldn't start a backup. Free a backup slot, or untick the backup and try again. Delete an old backup in Backups and try again.

Common problems

• The server stops with an out-of-memory error. The pack needs the RAM above. Open Download Log in the Console tab and look for the error, then change plan from the Settings tab if you are short.
• The install ends with an error in the console. Press Download Log, read the last lines and try the install again. If the pack's download fails, the install stops before it changes any of your files.
• Players cannot join. Check that the server has finished starting, which is when the console prints a line containing For help, type, and that you share the address from the left rail.