flatpak.mser.at

Various things missing from Flathub

This deploys a Flatpak repository that contains various things that are currently not available on Flathub. The main use case right now is for installing a couple of roguelike games on the Steam Deck (as Flatpak is what it supports out-of-the-box and what will survive system updates without manual intervention), hence why there aren't any other packages available (for now).

Both x86_64 and aarch64 variants are available and all packages are rebuilt automatically once a week.

Available applications

Name	ID	Type	Notes
Infra Arcana	`at.mser.InfraArcana`	Game
Sil-Q	`at.mser.SilQ`	Game	See here if you encounter an error when trying to launch using the X11 frontend

Usage

Adding the repository

To add the repository, use the flatpak remote-add command:

flatpak remote-add --if-not-exists flatpak.mser.at https://flatpak.mser.at/index.flatpakrepo

Alternatively, if you have a GUI client for Flatpak (e.g., Discover, if you are using a Steam Deck) you should be able to download the flatpakrepo file and just double-click it.

Listing available applications

To list all available applications, use the flatpak remote-ls command:

flatpak remote-ls flatpak.mser.at

Installing applications from the repository

To install an application, use the flatpak install command:

flatpak install flatpak.mser.at at.mser.InfraArcana

Breaking changes

Sometimes a change requires manual intervention on existing installations. These are listed here, newest first (and removed once they are no longer relevant):

[2026-07-02] - The applications have been renamed: all applications now use IDs under the at.mser.* namespace to make clear that these are unofficial repackagings and to avoid colliding with IDs the upstream projects would legitimately use if they ever published official Flatpaks: com.github.silquirk.SilQ is now at.mser.SilQ and com.gitlab.martintornqvist.InfraArcana is now at.mser.InfraArcana. To Flatpak, a renamed application is a different application, so existing installations no longer receive updates. Uninstall the old application, optionally move its data (e.g., savegames) to the new location and install the new application; e.g., for Sil-Q:
```
flatpak uninstall com.github.silquirk.SilQ
mv ~/.var/app/com.github.silquirk.SilQ ~/.var/app/at.mser.SilQ
flatpak install flatpak.mser.at at.mser.SilQ
```
[2026-06-24] - The repository is signed with a new GPG key: if you added the repository before this date, flatpak refuses to update the installed applications because the new signature no longer matches the pinned key. Remove and re-add the repository to pin the new key (installed applications and their data are kept):
```
flatpak remote-delete --force flatpak.mser.at
flatpak remote-add --if-not-exists flatpak.mser.at https://flatpak.mser.at/index.flatpakrepo
```

Maintainer

Michael Serajnik

Contribute

You are welcome to help out!

Open an issue or make a pull request.

Licenses

AGPL-3.0-or-later (Code and the Infra Arcana icon)
CC-BY-SA-4.0 (Documentation)
CC0-1.0 (Configuration and packaging metadata)
LicenseRef-Sil-Q-icon (Sil-Q icon)

This project follows the REUSE specification.