This is a repository holding some Flatpak builds I've assembled which I have yet to submit to Flathub for a variety of reasons - e.g. because the app is still going through developer changes and approval, the developers have gone missing or retired so I can't get approval for a submission, or the licensing situation is unclear or incompatible with Flathub, or the developers have specifically said they don't want their app to be listed on Flathub.

Setup

Run this command in a terminal window to set this repository up as a new remote for your Flatpak installation:

flatpak remote-add --user ykc https://flatpak.yellowkeycard.net/ykc.flatpakrepo

Once this is done, you can either click any of the Install buttons on this site to install the given application, or use the flatpak command line tool to search and install the applications as usual.

Current packages

App Install Submission status
Sonic and the Fallen Star

Sonic and the Fallen Star

flatpak install io.github.stardropsmh.sonic-and-the-fallen-star

Sonic the Hedgehog fan game 		Install Unsuitable for Flathub - Windows application with bundled wine
Fade to Black

Fade to Black

flatpak install io.github.fpiesche.f2bgl

A modern cross-platform port of Fade to Black 		Install Unsuitable for Flathub: developer retired and license unclear.
Mega Man: Rock'n'Roll

Mega Man: Rock'n'Roll

flatpak install com.dennisengelhard.megaman-rock-n-roll

Mega Man fan game 		Install Unsuitable for Flathub distribution - unclear licensing.
OpenEnroth

OpenEnroth

flatpak install io.github.openenroth.openenroth

Modern cross-platform port of the Might and Magic VI - VIII game engine 		Install Unsuitable for Flathub: no stable releases yet
Daggerfall Unity

Daggerfall Unity

flatpak install io.github.interkarma.daggerfall-unity

A modern port of The Elder Scrolls II: Daggerfall 		Install Developer refused Flathub submission
Sonic Triple Trouble 16-Bit

Sonic Triple Trouble 16-Bit

flatpak install com.wixsite.stt16bit

Fan remake of Sonic Triple Trouble in Genesis style 		Install Unsuitable for Flathub - Windows application with bundled wine
Hero Core

Hero Core

flatpak install se.remar.herocore

Sprawling action-exploration shooter 		Install Unsuitable for Flathub - Windows application with bundled wine
BuildGDX

BuildGDX

flatpak install net.duke4.m210.buildgdx

Java-based cross-platform port of the Build game engine 		Install Pending submission to Flathub
Aleph One

Aleph One

flatpak install org.lhowon.alephone

Aleph One is the open source continuation of Bungie’s Marathon 2 game engine 		Install Developer rejected Flathub submission (for now)
Iji

Iji

flatpak install se.remar.iji

Huge action-adventure platformer 		Install Unsuitable for Flathub - Windows application with bundled wine
Castle of Elite

Castle of Elite

flatpak install se.remar.castle

Puzzle platformer with a level editor 		Install Unsuitable for Flathub - Windows application with bundled wine
Prey

Prey

flatpak install io.github.glkarin.prey

Sci-fi shooter with horror elements 		Install Unsuitable for Flathub distribution due to messy repository name.
Sonic Galactic

Sonic Galactic

flatpak install io.github.sonicgalactic

Sonic the Hedgehog fan game 		Install Unsuitable for Flathub - Windows application with bundled wine
Xenia Canary

Xenia Canary

flatpak install jp.xenia.xenia-canary

Experimental Xbox 360 emulator 		Install Unsuitable for Flathub: no stable releases yet
Vita3K

Vita3K

flatpak install org.vita3k.vita3k

Experimental PlayStation Vita emulator 		Install Unsuitable for Flathub: no stable releases yet
Perfect Dark

Perfect Dark

flatpak install io.github.fgsfdsfgs.perfect_dark

Modern cross-platform port of Perfect Dark 		Install Unsuitable for Flathub due to licensing restrictions
Open Supaplex

Open Supaplex

flatpak install io.github.sergiou87.open-supaplex

A reverse-engineered port of Supaplex 		Install Waiting for dev approval for Flathub submission
Ironwail

Ironwail

flatpak install io.github.andrei_drexler.ironwail

A modern port of the original Quake engine, focused on performance 		Install Pending dev approval for Flathub submission
Quake 4

Quake 4

flatpak install io.github.glkarin.quake4

Sci-fi first-person shooter 		Install Unsuitable for Flathub distribution due to messy repository name.
Arx Libertatis

Arx Libertatis

flatpak install org.arx_libertatis.arxlibertatis

A cross-platform port of Arx Fatalis, a first-person role-playing game 		Install waiting for dev approval for Flathub submission
Aerofoil

Aerofoil

flatpak install io.github.elasota.aerofoil

A modern cross-platform port of Glider PRO, the classic Macintosh paper airplane game 		Install Pending submission to Flathub
Metroid Planets

Metroid Planets

flatpak install com.metroidconstruction.metroid-planets

Metroid (NES) fan game and creation tool 		Install Unsuitable for Flathub - Windows application with bundled wine
Mega Man Maker

Mega Man Maker

flatpak install com.megamanmaker.megamanmaker

Mega Man-themed game creation tool 		Install Unsuitable for Flathub - Windows application with bundled wine
VkDoom

VkDoom

flatpak install org.vkdoom.vkdoom

Modern Doom source port 		Install Unsuitable for Flathub: no stable releases yet
Hat World: New Testament

Hat World: New Testament

flatpak install jp.ne.sakura.rpgex.littleworld

RPG inspired by the SaGa series 		Install Unsuitable for Flathub - Windows application with bundled wine
dsda-doom

dsda-doom

flatpak install io.github.kraflab.dsda-doom

A vanilla-faithful Doom source port 		Install Developers have expressed no interest in Flathub submission.

Graduates

These are some Flatpaks which used to be available here that have been replaced; in most cases they've been published on Flathub publicly with approval and help from the upstream projects.

App Install Status
Hexen II: Hammer of Thyrion

Hexen II: Hammer of Thyrion

net.sourceforge.uhexen2.uhexen2

A modernized source port of Hexen II 		Install This package has graduated to Flathub.
DXX-Rebirth

DXX-Rebirth

io.github.dxx_rebirth.dxx-rebirth

Modern cross-platform port of the Descent engine 		Install This package has graduated to Flathub.
SPRAWL 96

SPRAWL 96

io.github.voidforce.qsprawl

A Quake mod based on the retro shooter SPRAWL 		Install This package has graduated to Flathub.
Prey

Prey

org.icculus.prey

Sci-fi shooter with horror elements 		Install This package has been replaced with the improved glKarin port.
GemRB

GemRB

org.gemrb.gemrb

Classic role-playing game engine 		Install This package has graduated to Flathub.
The Force Engine

The Force Engine

io.github.theforceengine.tfe

A modern cross‑platform port of “STAR WARS™: Dark Forces” with mod support 		Install This package has graduated to Flathub.
Quakespasm

Quakespasm

net.sourceforge.quakespasm.Quakespasm

A modern port of the original Quake engine 		Install This package has graduated to Flathub.
Hydra Castle Labyrinth

Hydra Castle Labyrinth

io.github.ptitSeb.hydracastlelabyrinth

A modern Linux port of the "metroidvania" game Hydra Castle Labyrinth 		Install This package has graduated to Flathub.
PsychEngine

PsychEngine

io.github.shadowmario.fnf-psychengine

Desktop implementation of Friday Night Funkin' 		Install This package has graduated to Flathub.
Azahar

Azahar

org.azahar_emu.azahar

Nintendo 3DS emulator based on Citra 		Install There is now an official Azahar distribution on Flathub.
The AMC Squad

The AMC Squad

io.itch.amcsquad.amcsquad

Epic story-driven FPS running on the Build Engine 		Install This package has graduated to Flathub.
Quake 4

Quake 4

com.idsoftware.quake4

Sci-fi first-person shooter 		Install This package has been replaced with the improved glKarin port.
shadPS4

shadPS4

net.shadps4.shadPS4

PS4 Emulator 		Install This package has graduated to Flathub.
Exult Ultima VII Engine

Exult Ultima VII Engine

info.exult.exult

Cross-platform engine for the Ultima VII games 		Install This package has graduated to Flathub.