Difference between pages "Emulation on Ubuntu" and "Distro-agnostic emulator packages for Linux"

From Emulation General Wiki
(Difference between pages)
Jump to navigation Jump to search
(Time to dust it off)
 
(AppImage: Updated)
 
Line 1: Line 1:
==THE GNU/LINUX GUIDE OF EMULATION: Ubuntu Edition==
+
'''Distro-agnostic packages''' are application portability solutions in Linux.
__NOTOC__
 
:<small>'''''Important!''' Like the title says, this guide covers Ubuntu and its derivatives. While you may have lesser or equal success with distributions that use APT (Ubuntu's packaging tool), where there could be relevant information in your case, this guide is not to be used for distributions that use Pacman or YUM. We can't guarantee that repositories here will work with Debian and Ubuntu-based Puppy (like Tahr), but we're not saying it's not possible. Give it a try, and it could work if you know what you're doing. However, distributions like Arch and Fedora use ''completely'' different packaging tools, and <u>thus are obviously guaranteed not to work.</u> Don't give up, though; you can find the same emulators for your distribution somewhere else, either in their official or user-curated repos or by compiling them from source.''</small>
 
===Info for newfriends===
 
Possibly the biggest difference between Windows and Ubuntu (and perhaps, GNU/Linux in general) is the way that programs are handled. On Windows, getting software requires the developer to package an installer (or a portable build for flash drives and the like) that you have to get from their website. They may also have to bundle dependencies (like the Visual C++ Runtime) or link you to their location if a license prevents that. If your software is closer to open-source, this is very different; either they have a repository that holds their own packages, someone has set one up for them, or they integrate their packages in the defaults (although this is very rare).
 
  
These "repositories" can be thought of like app stores. You use a package manager (either graphically or terminally) to search for programs in the repositories, from which you can install, update and uninstall them. It's really cool.
+
There are thousands of different distributions of Linux, and many of these use different package systems to manage application installation. Some popular ones are .deb format used by Debian, Ubuntu and its variants, and there is also RPM format used by [[Emulation on Fedora|Fedora]], RedHat, and many others.
 +
Packages of the game console and computer emulators exist for popular Linux distros, usually available from the official software repositories of the distribution, but they are usually very old compared to the upstream versions. In addition, these packages are typically made only for one single version of the distribution, and due to dependency problems, these can not be used in other distros.
 +
There are at least three new package formats that are aiming to bring application portability to the Linux ecosystem. Packages using these formats are quite huge in file size due to bundling all dependencies in it, but they can run in any popular Linux distros.
  
Your Linux distribution comes with repositories already configured so you can get a lot of the main programs immediately, but there are risks with the emulators in particular; repositories aren't focused on having every emulator, and in many cases when they do, they don't have newer versions. This isn't necessarily their fault though; especially with bigger distributions, repositories can be stuffed with ''loads'' of software that gets constant updates, so to get them tested and updated takes quite a bit of time. Rather than using the defaults, we'll add more repositories made by users or developers themselves that contain the latest versions of these emulators. Once these repositories are added, you will be able to install the emulators like with any other program and update them with the rest of your machine.
+
==Flatpak==
 +
Flatpak (formerly xdg-app) is a distro-agnostic application framework. It is a decentralized system and has no central package repository. Instead, the user must manually add the repository's URL to the system before packages can be installed, like in [[Emulation on Ubuntu|Ubuntu's PPA]].
  
While this can seem exciting, keep in mind that some emulators aren't available on repositories, and many good ones aren't on Linux at all, so you may need to use different methods to get them. But don't worry; this will be explained later.
+
[https://flathub.org/ Flathub], probably the biggest Flatpak repository, has several emulators.
  
===Adding new repositories===
+
To install emulators from Flathub, add the location of Flathub repository to your system:
:<small>''Note: If you ever rely on a tutorial that says to type <code>apt-get</code>, you can use <code>apt</code> instead. There generally isn't a difference.''</small>
 
:<small>''Another note: Pay attention to where <code>sudo</code> is used. That's the equivalent to running a Windows program as an administrator. If you're ever suspicious about any command you're told to type, you can type <code>man (command)</code> <sup>short for manual</sup> and it will tell you what that program does. E.g. <code>man apt</code> will tell you what apt does. To quit the documentation, just press q.''</small>
 
====Terminal====
 
To add a new repository from the terminal, just type in this command:
 
sudo add-apt-repository ppa:user/ppa-name
 
...where the <code>ppa:user/ppa-name</code> are the ones you'll find in the table for the repository you want to add. After you add all the repos you want, you'll run the next command to tell apt to refresh the list:
 
sudo apt update
 
Once that's done you will have all the packages from those repos available to install.
 
====Graphical====
 
To add a new repository from the GUI, install synaptic (or make sure it's installed) by typing in this command from the terminal:
 
sudo apt install synaptic
 
  
This program will be a lot of help. Once you have it installed you can choose to organize packages by source and see all the repos you already have available.
+
<code>$ flatpak remote-add --if-not-exists flathub https://dl.flathub.org/repo/flathub.flatpakrepo</code>
  
Select Settings > Repositories, and from the new window, select Other Software > Add...
+
List of available application package names can be obtained by the following command:
  
deb <nowiki>http://ppa.launchpad.net/</nowiki><u>ppa:user/ppa-name</u>/ubuntu <u>xenial</u> main
+
<code>$ flatpak remote-ls flathub</code>
  
Where instead of <u>xenial</u> for 16.04, you type <u>trusty</u> for 14.04, <u>bionic</u> for 18.04, <u>focal</u> for 20.04, <u>hirsute</u> for 21.04, and <u>impish</u> for 21.10.
+
Use the following command to install the emulator from Flathub:
  
You can then see what emulators you have with each repos, and can now install the ones you want.
+
<code>$ flatpak install flathub ''Package Name''</code>
  
===Repositories List===
+
Available emulators and its package name is listed below.
The "Type" column categorizes repositories by update frequency. Software in the Testing branches usually get updates as often as possible (even daily), while software in the Stable branches are only as recent as the versions are, and usually get updates between a few months. There are also several Abandoned PPAs which can be used only on older Ubuntu releases.
+
{| class="wikitable" width="100%"
 
 
If the desired emulator isn't found here, you can find more repositories by searching around for "(emulator) launchpad ppa". Check that they have packages for your Ubuntu version (they usually go by the version's name), as some PPAs can be abandoned.
 
 
 
{| class="wikitable mw-collapsible sortable" width="100%"
 
 
|-
 
|-
! Emulator/Project
+
! scope="col"|Emulator/Project
! ppa:user/ppa-name
+
! scope="col"|Package Name
! Type
 
! Latest Emulator Version
 
! Supported Ubuntu Versions
 
! ARM<ref group=N>These repositories have packages compiled for ARM architectures, and could work with HP Hardfloat, odroid, Raspberry Pi 2, etc.</ref>
 
 
|-
 
|-
|rowspan="2"|[[RetroArch]]<br/>(libretro)
+
|[[RetroArch]]<ref group=N>[https://www.libretro.com/index.php/retroarch-with-flatpak/ Official Flatpak Announcement of RetroArch]</ref>
|[https://launchpad.net/~libretro/+archive/ubuntu/testing ppa:libretro/testing]
+
|[https://flathub.org/apps/details/org.libretro.RetroArch org.libretro.RetroArch]
|Testing
 
|1.9.10
 
|180.04,20.04,21.04,21.10<ref group=N name=version>Core availability may vary between Ubuntu versions.</ref>
 
|{{✓}}
 
 
|-
 
|-
|[https://launchpad.net/~libretro/+archive/ubuntu/stable ppa:libretro/stable]
+
|[[RPCS3]]
|Stable
+
|[https://flathub.org/apps/details/net.rpcs3.RPCS3 net.rpcs3.RPCS3]
|1.9.10
 
|18.04,20.04,21.04,21.10<ref group=N name=version />
 
|{{✓}}
 
 
|-
 
|-
|[[VisualBoy Advance#VBA-M|VBA-M]]
+
|[[DuckStation]]
|[https://launchpad.net/~sergio-br2/+archive/ubuntu/vbam-trunk ppa:sergio-br2/vbam-trunk]
+
|[https://flathub.org/apps/details/org.duckstation.DuckStation org.duckstation.DuckStation]
|Stable
 
|2.0.1-r202107030448-c08bb6bd-22
 
|16.04,18.04
 
|{{✗}}
 
 
|-
 
|-
|rowspan="2"|[[PCSX2]]
+
|[[m64p]]
|[https://launchpad.net/~gregory-hainaut/+archive/ubuntu/pcsx2.official.ppa ppa:gregory-hainaut/pcsx2.official.ppa]
+
|[https://flathub.org/apps/details/io.github.m64p.m64p io.github.m64p.m64p]
|Stable
 
|1.4.0
 
|14.04,15.04,15.10,16.04,16.10,17.04,18.04
 
|{{✗}}
 
 
|-
 
|-
|[https://launchpad.net/~pcsx2-team/+archive/ubuntu/pcsx2-daily ppa:pcsx2-team/pcsx2-daily]
+
|[[Yuzu]]
|Testing
+
|[https://flathub.org/apps/details/org.yuzu_emu.yuzu org.yuzu_emu.yuzu]
|1.7.0~git202109251832+202109252351
 
|20.04,21.04,21.10
 
|{{✗}}
 
 
|-
 
|-
|rowspan="2"|[[MAME]]
+
|[[melonDS]]
|[https://launchpad.net/~c.falco/+archive/ubuntu/mame ppa:c.falco/mame]
+
|[https://flathub.org/apps/details/net.kuribo64.melonDS net.kuribo64.melonDS]
|Stable
 
|0.235
 
|18.04,20.04,21.04
 
|{{✓}}
 
|-
 
|[https://launchpad.net/~c.falco/+archive/ubuntu/alpha ppa:c.falco/alpha]<ref group=N>Some MAME builds may also appear in [https://launchpad.net/~c.falco/+archive/ubuntu/trashbin ppa:c.falco/trashbin].</ref>
 
|Testing
 
|0.235
 
|21.10
 
|{{✓}}
 
|-
 
|[[Dolphin]]
 
|[https://launchpad.net/~dolphin-emu/+archive/ubuntu/ppa ppa:dolphin-emu/ppa]
 
|Stable/Testing
 
|5.0+git-r202109240858-753a1595bf-33
 
|16.04,18.04
 
|{{✓|text=arm64}}
 
|-
 
|[[PCSX-Reloaded]]
 
|[https://launchpad.net/~rebuntu16/+archive/ubuntu/pcsx-reloaded-svn+unofficial ppa:rebuntu16/pcsx-reloaded-svn+unofficial]
 
|Abandoned
 
|1.9.94+git2017.02.28-16.13-1~ppa
 
|16.04,16.10,17.04<ref group=N name=bionic>This package is in the official repository for Ubuntu 18.04 and newer.</ref>
 
|{{✗}}
 
|-
 
|rowspan="2"|[[PPSSPP]]
 
|[https://launchpad.net/~ppsspp/+archive/ubuntu/testing ppa:ppsspp/testing]
 
|Abandoned
 
|1.7.0-r201811020013-fdb0732-85
 
|14.04,16.04,18.04,18.10
 
|{{✓}}
 
|-
 
|[https://launchpad.net/~ppsspp/+archive/ubuntu/stable ppa:ppsspp/stable]
 
|Stable
 
|1.7.0-r201810272345-caa506b-85
 
|14.04,16.04,18.04,18.10
 
|{{✓}}
 
|-
 
|[[ScummVM]]
 
|[https://www.scummvm.org/downloads/ Official Site (.deb)]<ref group=N>ScummVM's website provides raw Debian packages (.deb) which can be installed with tools like gdebi.</ref>
 
|Stable
 
|2.2.0
 
|18,04,19.10,20.04<ref group=N name=hirsute>This package is in the official repository for Ubuntu 21.04 and newer.</ref>
 
|{{✗}}
 
|-
 
|[[higan]]
 
|[https://launchpad.net/~hda-me/+archive/ubuntu/higan ppa:hda-me/higan]
 
|Stable
 
|106
 
|16.04<ref group=N name=bionic />
 
|{{✗}}
 
|-
 
|rowspan="2"|FS-UAE
 
|[https://launchpad.net/~fengestad/+archive/ubuntu/stable ppa:fengestad/stable]
 
|Stable
 
|3.0.5
 
|14.04,16.04,17.10,18.04,20.04,20.10<ref group=N name=hirsute />
 
|{{✗}}
 
|-
 
|[https://launchpad.net/~fengestad/+archive/ubuntu/devel ppa:fengestad/devel]
 
|Testing
 
|3.1.0
 
|14.04,16.04,17.10,18.04
 
|{{✗}}
 
|-
 
|[[DeSmuME]]
 
|rowspan="6"|[https://launchpad.net/~random-stuff/+archive/ubuntu/ppa ppa:random-stuff/ppa]
 
|Stable
 
|0.9.11+r1~4
 
|12.04,14.04,15.04,15.10,16.04<ref group=N name=broken_desmume>Packages for 16.10 and newer are listed but broken.</ref><ref group=N name=bionic />
 
|{{✓}}
 
|-
 
|[[Mupen64Plus]]
 
|Testing
 
|2.5-7+r630~7
 
|14.04,15.04,15.10,16.04<ref group=N name=yakkety>This package is in the official repository for Ubuntu 16.10 and newer.</ref>
 
|{{✓}}
 
|-
 
|PokeMini
 
|Stable
 
|0.60-r8~4
 
|14.04,15.04,15.10,16.04,16.10,17.04,17.10
 
|{{✓}}
 
|-
 
|[[Gambatte]]
 
|Stable
 
|0.5.0-r577-b575~5
 
|12.04,14.04,15.04,15.10,16.04,16.10,17.04,17.10
 
|{{✓}}
 
|-
 
|[[Supermodel]]
 
|Abandoned
 
|0.3a~WIP+r710~23
 
|None<ref group=N name=broken_supermodel>Packages for 14.04,16.04,17.10 are listed, but all of them are broken since January 2018.</ref>
 
|{{✓}}
 
|-
 
|[[Snes9x]]
 
|Stable
 
|1.54.1-r201805250105-98d3d27-3
 
|17.10,18.04<ref group=N name=broken_snes9x>Packages for 14.04 and 16.04 are listed but broken.</ref>
 
|{{✓}}
 
|-
 
|[[BlastEm]]
 
|rowspan="17"|[https://launchpad.net/~samoilov-lex/+archive/ubuntu/retrogames ppa:samoilov-lex/retrogames]<ref group=N name=warning_retrogames>This PPA contains unofficial builds of RetroArch, Dolphin, PPSSPP, PCSX2, FS-UAE and more, thus may cause conflict with other PPAs if you are on Ubuntu 18.04 or below. (This is less likely a problem on 20.04 or newer because other PPAs have abandoned support for newer Ubuntu versions.) After installing a desired emulator from this PPA, it is recommended to remove this PPA from the system's repository list by executing "sudo add-apt-repository --remove ppa:samoilov-lex/retrogames" in the command line.</ref>
 
|Stable
 
|0.6.0
 
|16.04,18.04,20.04
 
|{{✓}}
 
|-
 
|[[Citra]]
 
|Testing
 
|1:0.1~git20210618-1~retrogames
 
|20.04
 
|{{✗}}
 
 
|-
 
|-
 
|[[Dolphin]]
 
|[[Dolphin]]
|Testing
+
|[https://flathub.org/apps/details/org.DolphinEmu.dolphin-emu org.DolphinEmu.dolphin-emu]
|5.0.14344-1~retrogames
 
|20.04
 
|{{✗}}
 
|-
 
|[[Hatari]]
 
|Stable
 
|2.2.1
 
|16.04,18.04
 
|{{✓}}
 
 
|-
 
|-
|[[Mednafen]]
+
|[[DOSBox]]
|Stable
+
|[https://flathub.org/apps/details/com.dosbox.DOSBox com.dosbox.DOSBox]
|1.27.1
 
|20.04
 
|{{✓}}
 
 
|-
 
|-
|[[melonDS]]
+
|FS-UAE
|Stable
+
|[https://flathub.org/apps/details/net.fsuae.FS-UAE net.fsuae.FS-UAE]
|0.9.2-2~retrogames
 
|20.04
 
|{{✓}}
 
 
|-
 
|-
 
|[[mGBA]]
 
|[[mGBA]]
|Stable
+
|[https://flathub.org/apps/details/io.mgba.mGBA io.mgba.mGBA]
|0.9.1-1~retrogames
 
|20.04
 
|{{✗}}
 
 
|-
 
|-
|[[PCem]]
+
|[[Nestopia]]
|Stable
+
|[https://flathub.org/apps/details/ca._0ldsk00l.Nestopia ca._0ldsk00l.Nestopia]
|17
 
|20.04
 
|{{✗}}
 
 
|-
 
|-
 
|[[PCSX2]]
 
|[[PCSX2]]
|Stable
+
|[https://flathub.org/apps/details/net.pcsx2.PCSX2 net.pcsx2.PCSX2]
|1.6.0
 
|20.04
 
|{{✗}}
 
 
|-
 
|-
|PCSX2 Unstable
+
|[[Citra]]
|Testing
+
|[https://flathub.org/apps/details/org.citra_emu.citra flatpak.citra-emu.org]
|1.7.1~git20210618.044034-1~retrogames
 
|20.04
 
|{{✗}}
 
|-
 
|[[reicast]]
 
|Stable
 
|1:20.04-2~retrogames
 
|20.04
 
|{{✗}}
 
 
|-
 
|-
|[[Stella]]
+
|[[PPSSPP]]
|Stable
+
|[https://flathub.org/apps/details/org.ppsspp.PPSSPP org.ppsspp.PPSSPP]
|5.1.1
 
|16.04,18.04
 
|{{✓}}
 
 
|-
 
|-
 
|[[Snes9x]]
 
|[[Snes9x]]
|Stable
+
|[https://flathub.org/apps/details/com.snes9x.Snes9x com.snes9x.Snes9x]
|1:1.60-2~retrogames
 
|20.04
 
|{{✗}}
 
 
|-
 
|-
|[[yuzu]]
+
|[[VICE]]
|Testing
+
|[https://flathub.org/apps/details/net.sf.VICE net.sf.VICE]
|1:0.0.0~git20200819-1~retrogames
 
|20.04
 
|{{✗}}
 
 
|-
 
|-
|[[Vita3K]]
+
|[[FUSE]]
|Stable
+
|[https://flathub.org/apps/details/net.sf.fuse_emulator net.sf.fuse_emulator]
|0.1.0~git20180527.1-3~retrogames
 
|18.04
 
|{{✗}}
 
 
|-
 
|-
|[[puNES]]
+
|[[ScummVM]]
|Stable
+
|[https://flathub.org/apps/details/org.scummvm.ScummVM org.scummvm.ScummVM]
|0.106-1~retrogames
 
|20.04
 
|{{✗}}
 
|-
 
|[[Yabause]]
 
|Stable
 
|0.9.15-1~retrogames
 
|18.04
 
|{{✗}}
 
|-
 
|[[FCEUX]]<br/>[[ZSNES]]<br /><small>Other older emulators not listed</small>
 
|Official Ubuntu repos
 
|Varies<ref group=N>Only updated once per Ubuntu version.</ref>
 
|Varies
 
|Varies
 
|{{~}}
 
 
|}
 
|}
 
<references group=N />
 
<references group=N />
  
 +
==Snappy==
 +
Snappy, also called 'snaps' or just 'snap', is a distro-agnostic application framework made by Canonical, the Ubuntu devs. Unlike other formats, it is a centralized system and has the official repository to download the packages from.
 +
List of all packages can be viewed from [https://uappexplorer.com/snaps?type=application uApp Explorer] (Lists all latest packages but often flooded with "Hello World" apps) and [https://snapcraft.io/store Snapcraft] (Apps are listed by categories).
 +
 +
Snappy has the following emulators:
 +
*[https://snapcraft.io/retroarch RetroArch] ([https://www.libretro.com/index.php/retroarch-snap-packages-now-available/ Official Announcement])
 +
*[[Hatari]] [https://snapcraft.io/hatari-emulator]
 +
*[[DOSBox]] [https://snapcraft.io/dosbox-jz]
 +
*FS-UAE [https://snapcraft.io/fsuae]
 +
*Atari800 [https://snapcraft.io/atari800-jz]
 +
*[[VICE]] [https://snapcraft.io/vice-jz]
 +
*[[ScummVM]] [https://snapcraft.io/scummvm]
 +
*Virtual Jaguar [https://snapcraft.io/virtualjaguar-jz]
 +
*[[MAME]] [https://snapcraft.io/mame]
 +
*[[Citra]] [https://snapcraft.io/search?q=Citra]
 +
*[[Yuzu]] [https://snapcraft.io/yuzu]
 +
*[[Dolphin]] [https://snapcraft.io/dolphin-emulator]
 +
*[[RPCS3]] [https://snapcraft.io/rpcs3-emu]
 +
*[[PPSSPP]] [https://snapcraft.io/ppsspp-emu]
  
===Distro-independent Packages on Ubuntu===
+
==AppImage==
{{main|Distro-agnostic emulator packages for Linux}}
+
AppImage is a package format that allows software distribution without a superuser permission. Unlike the other two, AppImage does not have a system to find, download, install and uninstall the packages. Instead, it works like Microsoft Windows .exe files with no DLL requirements.
 +
The user must give the 'executable' permission to the AppImage package (chmod +x ./appname.AppImage) but this is the only requirement.
  
There are also distribution-independent emulator packages in [[Distro-agnostic_emulator_packages_for_Linux#Snappy|Snappy]], [[Distro-agnostic_emulator_packages_for_Linux#Flatpak|Flatpak]] or [[Distro-agnostic_emulator_packages_for_Linux#AppImage|AppImage]] formats which can be used instead of Ubuntu PPA. These packages are especially useful for users of Ubuntu 20.04 or newer because most PPAs are abandoned.
+
Unfortunately, emulator adaption is quite poor compared to the other two systems. [[RPCS3]] and [[yuzu]] are the most notable emulators to officially adopt this format.
  
Snappy packages are currently the default method of installing software in Ubuntu, encouraged by Canonical - developers of Ubuntu. Installing snaps is very simple, just open Ubuntu Software app and find your desired emulator from there, confirming installation with your user (or root user) password. No additional configuration is required to install snaps.
+
List of AppImage packages can be found in [https://appimage.github.io/apps/ AppImageHub].
  
 +
Emulators available in AppImage:
  
== Links ==
+
* [[RPCS3]]
* [https://doc.ubuntu-fr.org/emulation French Guide] on Ubuntu.org
+
* [[yuzu]]
 +
* [https://github.com/probonopd/qemu-ppc QEMU_PowerPC] (A PowerPC emulator)
 +
* [[RetroArch]] [https://forums.libretro.com/t/linux-retroarch-runtime-for-every-modern-distro-with-appimage/4965] (not updated since v1.3.4)
 +
* [https://github.com/ferion11/PCSX2_Appimage PCSX2]
 +
* [[Dolphin]] [https://www.appimagehub.com/p/1567651]
 +
* [[mGBA]] [https://www.appimagehub.com/p/1567223]
 +
* [[Gambatte]] [https://www.appimagehub.com/p/1566704]
 +
* [[DuckStation]] [https://www.appimagehub.com/p/1460142]
 +
* [[Project64]] [https://www.appimagehub.com/p/1411238]
 +
* [[PPSSPP]] [https://www.appimagehub.com/p/1411234]
 +
* [[DeSmuME]] [https://www.appimagehub.com/p/1411229]
  
 
[[Category:FAQs]]
 
[[Category:FAQs]]

Revision as of 16:01, 26 September 2021

Distro-agnostic packages are application portability solutions in Linux.

There are thousands of different distributions of Linux, and many of these use different package systems to manage application installation. Some popular ones are .deb format used by Debian, Ubuntu and its variants, and there is also RPM format used by Fedora, RedHat, and many others. Packages of the game console and computer emulators exist for popular Linux distros, usually available from the official software repositories of the distribution, but they are usually very old compared to the upstream versions. In addition, these packages are typically made only for one single version of the distribution, and due to dependency problems, these can not be used in other distros. There are at least three new package formats that are aiming to bring application portability to the Linux ecosystem. Packages using these formats are quite huge in file size due to bundling all dependencies in it, but they can run in any popular Linux distros.

Flatpak

Flatpak (formerly xdg-app) is a distro-agnostic application framework. It is a decentralized system and has no central package repository. Instead, the user must manually add the repository's URL to the system before packages can be installed, like in Ubuntu's PPA.

Flathub, probably the biggest Flatpak repository, has several emulators.

To install emulators from Flathub, add the location of Flathub repository to your system:

$ flatpak remote-add --if-not-exists flathub https://dl.flathub.org/repo/flathub.flatpakrepo

List of available application package names can be obtained by the following command:

$ flatpak remote-ls flathub

Use the following command to install the emulator from Flathub:

$ flatpak install flathub Package Name

Available emulators and its package name is listed below.

Emulator/Project Package Name
RetroArch[N 1] org.libretro.RetroArch
RPCS3 net.rpcs3.RPCS3
DuckStation org.duckstation.DuckStation
m64p io.github.m64p.m64p
Yuzu org.yuzu_emu.yuzu
melonDS net.kuribo64.melonDS
Dolphin org.DolphinEmu.dolphin-emu
DOSBox com.dosbox.DOSBox
FS-UAE net.fsuae.FS-UAE
mGBA io.mgba.mGBA
Nestopia ca._0ldsk00l.Nestopia
PCSX2 net.pcsx2.PCSX2
Citra flatpak.citra-emu.org
PPSSPP org.ppsspp.PPSSPP
Snes9x com.snes9x.Snes9x
VICE net.sf.VICE
FUSE net.sf.fuse_emulator
ScummVM org.scummvm.ScummVM

Snappy

Snappy, also called 'snaps' or just 'snap', is a distro-agnostic application framework made by Canonical, the Ubuntu devs. Unlike other formats, it is a centralized system and has the official repository to download the packages from. List of all packages can be viewed from uApp Explorer (Lists all latest packages but often flooded with "Hello World" apps) and Snapcraft (Apps are listed by categories).

Snappy has the following emulators:

AppImage

AppImage is a package format that allows software distribution without a superuser permission. Unlike the other two, AppImage does not have a system to find, download, install and uninstall the packages. Instead, it works like Microsoft Windows .exe files with no DLL requirements. The user must give the 'executable' permission to the AppImage package (chmod +x ./appname.AppImage) but this is the only requirement.

Unfortunately, emulator adaption is quite poor compared to the other two systems. RPCS3 and yuzu are the most notable emulators to officially adopt this format.

List of AppImage packages can be found in AppImageHub.

Emulators available in AppImage: