One app that installs the whole modpack, keeps it up to date, and drops you straight onto the server. No other launcher needed.
The launcher handles the whole setup for you: it downloads the full Ragnarok modpack, installs the exact Minecraft and Forge versions it needs, keeps everything patched, and starts the game already pointed at the server.
Grab the whole modpack in a single step. No hunting for mod jars, no version guesswork, no manual folders to build.
When the pack changes, the launcher downloads only what actually changed and verifies every file, so updates are quick and never leave you with a broken install.
It installs the right Minecraft and Forge by itself. You do not need the official launcher or any third party launcher running alongside it.
One download runs on all three. The same launcher, the same pack, the same server, whatever you play on.
Set how much RAM the game gets and point it at a specific Java install when you need to. Sensible defaults out of the box for everyone else.
Hit play and it launches you directly onto Ragnarok. No copying an IP, no adding a server entry by hand.
A quick checklist so the launcher can do its job.
The launcher runs on Java 17 or a later release. If you already run modded Minecraft you very likely have it, and you can point the launcher at a specific Java path in its settings.
You need a legitimate Minecraft Java Edition account to play. Ragnarok does not support cracked or offline accounts.
Plan for the disk space and memory a large modpack expects: several gigabytes free on disk, and enough RAM to give the game a healthy allocation. More is better on both.
Three steps from download to fighting.
Grab dmz-ragnarok-launcher-0.9.0.jar from the download link and drop it wherever you like to keep it.
Double click the jar to open it. If double clicking does nothing on your system, open a terminal in the same folder and run java -jar dmz-ragnarok-launcher-0.9.0.jar.
The launcher pulls down the pack, sets up Minecraft and Forge, and hands off into the game. After the first run it only checks for updates, so later launches are fast.
The launcher is in an active beta. Microsoft sign in is in review with Microsoft and is not usable yet, so the sign in step is still being finished. Everything else described on this page, the install, the updates, the built in Minecraft and Forge setup, the RAM and Java settings, and the launch into the server, is already working. The beta build below is available now if you want to try it early or help us test.
Pick the build for your system. The Windows and Linux builds include Java, so there is nothing else to install. This is a beta: it installs and updates the pack, but Microsoft sign in is still in review, so use the download button inside the launcher to get the pack and hop in the Discord if you hit a snag.
On Windows, put the installer wherever you want the launcher to live and run it. It creates a DMZ Ragnarok Launcher folder next to itself, then open that folder and run DMZ Ragnarok Launcher.exe. Windows will most likely warn you that it does not recognise the app, because the installer is not code signed yet. Choose More info and then Run anyway. On Linux, mark the AppImage executable and run it. The Java file works anywhere but needs Java 17 or newer already installed.