What Are Addons in OpenGameInstaller and What Do They Do?

Updated

Addons are the components that let OpenGameInstaller support different game sources. Rather than shipping with a fixed set of built-in stores, the tool is described as an "addon-powered" game manager: the addon layer is how it installs, organizes, and launches games "from multiple sources." If you want to know which sources you can use, the answer lives in the addon list rather than in a fixed catalog baked into the app.

How the addon model works

OpenGameInstaller presents itself as a desktop game manager for Windows and Steam Deck workflows. Its core job is to install, organize, and launch games; the addon layer is what connects that core to a particular source.

A useful way to think about it: the manager provides the shared plumbing — the install flow, the library organization, and the launch step — while each addon supplies the source-specific part. That separation is why the product describes itself as handling "multiple sources" instead of listing stores as native features.

For example, if you wanted to manage games from two different sources, you would not look for two separate built-in storefronts inside the app. You would look for the addons that correspond to those sources, and the manager would then handle installing, organizing, and launching them through the same workflow.

Where to find the available addons

The site exposes an Addons List entry alongside its main navigation (which also includes download, documentation, and a releases list). That list is the place to check what addons exist and, by extension, which sources the tool can currently work with.

Practical steps:

  1. Open the site and go to the Addons List.
  2. Review which addons are listed there — these define the sources you can manage.
  3. Use the Documentation for setup details on how addons are added and used.
  4. Use the releases list if your OS is not yet supported, since the download area notes when your operating system isn't supported yet.

Expected result: you end up with a concrete picture of which sources are covered, instead of assuming a store is built in.

What addons do and do not tell you

  • They define source coverage. The set of available addons is the practical limit on which sources you can manage. There is no separate built-in store catalog described on the site.
  • They sit inside a shared workflow. Installing, organizing, and launching are presented as the manager's functions, with addons supplying the source side.
  • They are not a pricing signal. The site materials do not state pricing, licensing terms, or whether addons or the app are free, so treat cost and access conditions as unconfirmed until you check the documentation or the addon entries themselves.

When this model fits your needs

Choose an addon-based manager like this if you expect to pull games from more than one source and want one place to install, organize, and launch them, and if you are on Windows or a Steam Deck workflow. Check the addon list first: if the sources you care about are not represented there, the tool will not cover them regardless of other features. If your OS shows as unsupported on the download page, check the releases list before planning around it.