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ATLauncher - Modpack launcher for Minecraft

Welcome to the ATLauncher website. This is the main point of contact to download ATLauncher, get information about ATLauncher and the packs in it as well as get some help.

ATLauncher is a simple and easy to use Minecraft Launcher which contains 148 modpacks for you to choose from, as well as the ability to browse and install packs from other platforms including CurseForge, FTB, Modrinth and Technic.

So why not take a look at the different packs that are available or just download ATLauncher and give a try yourself. If you're still unsure about us, then visit our about page to get a list of features.


May 18, 2022 - CurseForge Modpacks Project Distribution Toggle

When CurseForge announced that an official api was coming for third parties to use, there was a caveat. Projects on CurseForge would have the ability to decide if third parties are able to download their projects. This meant that any mod on CurseForge can choose to turn off distribution of their mods to all third party clients.

This change has taken effect as of today and will mean some changes for the way you download modpacks from CurseForge.

Any modpacks which include mods that have disabled third parties from downloading them will require extra steps to manually download those mods via your browser in order to complete the installation process.

A similar process will be involved for any mods added to instances from CurseForge also.

If you see any issues downloading CurseForge modpacks or mods, please reach out in our Discord.

May 17, 2022 - Modrinth Modpacks Have Launched

Modrinth Modpacks have now launched in an Alpha state.

For those not aware, Modrinth is a mod (and now modpack) platform as an alternative to CurseForge. Modrinth is open source and has quite an active development and is very exciting to watch the progress that Modrinth makes. To find out more about Modrinth and what they're doing, check out

The latest is that Modpacks are now available to be uploaded and downloaded from Modrinth. ATLauncher has support for both exporting instances to the Modrinth format ready for uploading to Modrinth, as well as downloading and installing pre made packs.

While this is in an Alpha state, everything looks pretty promising so far, and we can't wait to see more awesome packs up there soon.

So go check out the Modrinth tab in the Packs section of the launcher today and maybe find something new to play.

Feb 11, 2022 - Microsoft accounts required as of March 10

As you may or may not be aware, Minecraft will require the use of Microsoft accounts starting the 10th of March, 2022.

If you've not yet migrated your old legacy/Mojang account over to a Microsoft account, then you'll lose access to be able to login on March 10th, 2022.

For more information and instructions on how to migrate, please see the blog post about this announcement or visit

Dec 18, 2021 - Further update on security vulnerability in Minecraft

As a further news item on from the previous one around the Log4J exploit in Minecraft.

ATLauncher has just released version which fully patches all Log4J versions for all instances which include the Log4J library as follows:

- Minecraft 1.7 to 1.11.2 now uses a patched version of Log4J (version 2.0-beta-9-fixed)
- Minecraft 1.12 and onwards uses an updated version of Log4J with the vulnerabilities fixed (version 2.16.0)

While the patches that Mojang applied to their own launcher, and were applied in our previous launcher updates will fix the issue, these fixes provide a complete fix to the issue and leave no doubt that there are any more issues going forward (at least for the issues that we know of today).

These libraries will automatically download and install themselves the next time you launch your instances, there's nothing you need to do. For servers, you will need to recreate them to get the latest versions downloaded and applied.

As we've always mentioned, you should also make sure you're using the latest Fabric/Forge version where possible.

Dec 10, 2021 - Security vulnerability in Minecraft

As you may or may not be aware, there was recently a security vulnerability exposed within Minecraft through the Log4J library that is included and used by Minecraft versions 1.7 and later.

Mojang have already released a fix for the issue.

ATLauncher has released 2 updates to also address this issue. The first was to introduce a command line argument to prevent the exploit from happening. This is only effective in 1.17 and above. The second update ( to make sure that on launch of your instances, the latest manifest is downloaded from Mojang and their fix applied to your instance before launching.

To make sure you have the latest version of ATLauncher, make sure to restart the launcher or use the Update Data button in the bottom left of the launcher to get any new updates for the launcher.

The best solution to make sure you stay safe is to update any instances that have them available or if you're using a vanilla instance with Fabric or Forge, you can make sure to update your Fabric/Forge version to the latest.

It's also important to note that these fixes will only apply to instances. Any servers created and run through the launcher before the 13th of December may not be safe to run and you should and you should delete and remake them to be safe. Again the best thing is to make sure you keep your Fabric/Forge version up to date if you use it.

If you have any concerns or questions, please reach out in our Discord server.