The fastest WoT modpack installer in the world

View the Project on GitHub Willster419/RelhaxModpack

The Relhax Modpack

The fastest WoT modpack installer in the world. A refresh of OMC modpack

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License Information

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Description and reason for development

This project is in dedication of the RELIC Gaming Community, as well as the OMC modpack dev team (which includes me, :)). A big thank you to them and their original work, especially to grumpelumpf. He gave the idea and design of the database driver approach, and is the reason why this modpack is where it is today. His work done on the OMC modpack over the years will not be forgotten.

When I looked at the current modpack installers, they all look the same: in size, in UI, and were all made with the inno setup creator. Many describe these installers as “clunky and slow”. Trying to get that perfect mod setup can sometimes take hours. Have you ever had a “modpack setup night”?

The goal of this project is to redefine what a modpack installer is, from the templace UI to the install engine. Instead of using inno setup, I decided to create my own install engine from scratch in Microsoft’s C# programming language. Some of the UI features in this modpack are new(tab category view), and some are kept in line with previous modpacks (right click to preview).

Modpack Features

Why would you use this modpack over Aslain’s/OMC’s/any other inno setup template modpack?

What does the modpack look like?



Prefer the OMC style selection view?


Additional Information

If you come across a bug or feature request please take one of these actions:

When you do, please attach the diagnostic zip file you create by clicking diagnostic utilities->create zip file

If you want to help develop the modpack, I would be glad for the help and will help set you up with an environment.

Latest release notes can be found here:


You can download the modpack from this link: (donate link) (direct link) (WG mods link)

If you can spare a few dollars and like the Modpack, please consider donating:



Why is there such a difference in install times?

While inno setup single-threaded (as far as I can tell), mine is not. What does that mean? Looking at mod zip extraction, for example, when a file is extracted, it is reported to the GUI in a synchronous manner. This means that the modpack can only extract as fast as it can pump events to the GUI for each entry extracted in a zip file. This is where multi-threading come in. You can create a separate thread and have it only extract, and asynchronously report the progress to the GUI. This means three things:

I have a perfect selection of mods that I want. Can I save this selection?

Yes. Press the save selection button. It will save your config file wherever you tell it to save it. I recommend you save it in the default folder.

Do I have to install my personal mods/configs myself after this is done?

No :) You can put your mods in the “RelHaxUserMods folder”, and the installer will add them to the “User Mods” tab. You can install them just like they were regular mods. You can even use it to patch files with the installer’s patching system, and install fonts.

How can I use the “auto-install” option?

You need to create a shortcut to the application. Right click it, properties. In the target textbox, append “/auto-install config_file.xml”, where:

(1)Performance measurements:

Hard drive used is a Toshiba 5400 RPM 2.5 inch laptop hard drive, 8MB cache

Time from program execution to mod selection on a hard drive:

OMC: 48 seconds

Aslains: 24 seconds

Relhax: 5 seconds - Time reduced by 89% from OMC and 80% from Aslains

Time from mod selection to install completion (installing the same number or similar mods) on a hard drive:

Mod Selection: Zoom 100m patch, Relhax Sound Mod (or equivalent)

OMC: 10 seconds

Aslains: 9 seconds

Relhax: 4 seconds - **Time reduced by 60% from OMC and 56% from Aslains

The Relhax Modpack ~ “Would you rather spend time on your mods, or your gameplay?” ~


I am in contact with WarGaming about the modifications (mods) and their configurations (configs) to ensure that they are legal and allowed in the game. There are no “Hacks” or illegal mods in the modpack, the name is used for artistic license. This modpack complies with WG’s fair play policy. We try to keep up to date as much as we can with their policy, but this is by no means an official guarantee.