Where to (legally) acquire content to play on RetroPie

Auster

@auster About AtariAge...

My second e-mail:

Thank you for your reply for the ticket #BZV-722-63716, but I have one last question:
As mentioned before, the site offers copyrighted files, such as system files/BIOS for Atari Lynx and Atari 5200, to download.
These files are available outside of the forum part of the site, in a stickied part of it, the "Systems" part in the top left, then in the "Emulation" part that appears in those same stickied options.
The question is, downloading these files would be considered piracy? Or do the site owners have the rights to share these files?

Their reply:

Thank you for the question. These links are there to help users with easy fixes. We do not mind if they use them. Remember though, we do NOT advise this. If you try and use the links I would use the ones from the actual Atari page.
Best Regards,
Atari Support

Sounds like Atari is fine with AtariAge sharing these files. Also, Atari has these files available as well? I couldn't find them in their site.

Auster

NESert Golfing: https://rainwarrior.itch.io/nesert-golfing
Platform: NES & Famicom Disk System
Has 3 ROMs. DGOLF.NES is the randomly generated NES version. DGOLF_TE.NES (Tournament Edition) is the version where you can set a generation seed so it isn't random. DGOLF.FDS is the Famicom Disk System ROM based on the DGOLF.NES version.

Lizard: https://rainwarrior.itch.io/lizard
Platforms: NES & MS-DOS (and also the more common PC OS's used today)
Includes both a demo and a full release of all the versions, all properly identified.

Rulent Tower (+16 y.o. rating, maybe?): https://setsune.itch.io/rulenttower
Platform: GameBoy
The ROM is the downloadable .gb file (written as ".ab" in the file preview, likely a typo). Mind that while there's nothing explicity, the game has multiple mentions to more riské stuff. And the development appears to have been halted for a while now.

Gift Catcher: https://drludos.itch.io/gift-catcher
Platform: Atari Lynx
The ROMs are properly specified in the downloadable files.
Also includes the source code if you want to make your own games for the platform.

The Last Super: https://drludos.itch.io/the-last-super
Platform: SNES
The ROM is properly specified in the downloadable files.
Also includes the source code if you want to make your own games for the platform.

Timeloop: https://drludos.itch.io/timeloop
Platform: Atari Lynx
The ROMs are properly specified in the downloadable files.
Also includes the source code if you want to make your own games for the platform.

Keeping SNES Alive!: https://drludos.itch.io/keeping-snes-alive
Platform: SNES
The ROM is properly specified in the downloadable files.
Also includes the source code if you want to make your own games for the platform.

Fishing for ATARI: https://drludos.itch.io/fishing-for-atari
Platform: Atari Lynx
The ROMs are included in the downloadable file.
Also includes the source code if you want to make your own games for the platform.

Yo-Yo Shuriken: https://drludos.itch.io/yo-yo-shuriken
Platform: SNES
The ROM is the downloadable .sfc file.

DMG Deals Damage: https://drludos.itch.io/dmg-deals-damage
Platform: GameBoy
The ROM is the downloadable .gb file.

Growing Ties: https://drludos.itch.io/growing-ties
Platform: Atari Lynx
The ROMs are inside the downloadable .zip file.

MeteoRain (GameShell Jam #1): https://drludos.itch.io/meteorain-gameshell-jam-1
Platform: Sega Genesis/Mega Drive
The ROM is the downloadable .bin file.

Sheep It Up!: https://drludos.itch.io/sheep-it-up-2600
Platform: Atari 2600
The ROMs are the downloadable files (differences specified).

30 Years of Nintendon't: https://drludos.itch.io/30-years-of-nintendont
Platform: Sega Genesis/Mega Drive
The ROM is the downloadable .bin file.

Sheep It Up!: https://drludos.itch.io/sheep-it-up
Platform: GameBoy
The ROM is the downloadable .gb file.

Break An Egg (0h Game Jam): https://drludos.itch.io/break-an-egg
Platform: Sega Genesis/Mega Drive
The ROM is the downloadable .bin file.
Also includes the source code if you want to make your own games for the platform.

Frog: https://boston-breams.itch.io/frog
Platform: NES
The ROM is the .nes file inside the downloadable .zip file.

Light From Within: https://atarath.itch.io/light-from-within
Platform: NES
The ROM is the downloadable .nes file.

Deep Blue: https://wendelscardua.itch.io/deep-blue
Platform: NES
The ROM is the downloadable .nes file.

NESDev '19 Compo Cart: https://action53.itch.io/compocart19
Platform: NES
Multiple games included inside the ROM. The ROM is the .nes file inside the downloadable .zip file.
These games, along with where to download them that I could find (as linked in the anthology page or the forums of the organizers), are...
down the rabbit hole we go

All games as separated ROMs but together in a single zip file: https://neshomebrew.ca/contest19/

Click in the "HERE" in the part that says "You can DOWNLOAD all the Category 1 entries HERE."
The ROMs are the .nes files inside.

Böbl (previously mentioned here), also available here: https://forums.nesdev.com/viewtopic.php?f=35&t=19718
Both ROMs are the .nes files in the first post.

Nalleland, also available here: https://nallebeorn.itch.io/nalleland
The ROM is the downloadable .nes file.
And also available here: https://forums.nesdev.com/viewtopic.php?f=35&t=19790
The ROM is the downloadable .nes file in the first post.

Blockage (previously mentioned here), also available here: https://forums.nesdev.com/viewtopic.php?f=35&t=19602
The ROM is the downloadable .nes file in the first post.

Veggie Invaders, also available here: https://forums.nesdev.com/viewtopic.php?t=19799
The ROM is the downloadable .nes file in the first post.

NIN NIN, also available here: https://forums.nesdev.com/viewtopic.php?f=35&t=19796
The ROM is the downloadable .nes file in the first post.

Bloodfall, also available here: https://forums.nesdev.com/viewtopic.php?f=35&t=19780
The ROM is the .nes file that can be downloaded from the part that says "ROM attached to this post (NROM)".

Falling Tiles, also available here: https://forums.nesdev.com/viewtopic.php?f=35&t=19696
The ROMs are the 2 downloadable .nes files spread across the post. Search for ".nes" (without quotation marks) with your browser's text search function (usually Ctrl F).

Hot Dance 2020: Dance!, also available here: https://forums.nesdev.com/viewtopic.php?f=35&t=19791
The ROM is the downloadable .nes file in the first post.

NNNNNN, also available here: https://www.bitethechili.com/nnnnnn/
The ROM is the .nes file inside the .zip file you can download from the "Download for NES" button.
And also available here: https://forums.nesdev.com/viewtopic.php?f=35&t=19579
Search for ".nes" with Ctrl F again.

Save the Kuin, also available here: https://kaffeeware.github.io/
The ROM is the .nes file in the part that says "download v05". Just click it to download.

Super City Mayor, also available here: https://globalgamejam.org/2020/games/super-city-mayor-3
The ROM is the .nes file inside the downloadable file "SuperMayor_Binary.zip"

Some sites linked in the anthology above that deserve special mentions:

Spanish site with a bunch of homebrews: https://www.mojontwins.com/juegos_mojonos/
Includes ROMs from Amstrad, Commodore 64, Master System, Mega Drive/Genesis, MS-DOS, MSX/MSX2, NES, SG-1000, ZX Spectrum and ZX81.
Some appear to be available in multiple languages.

Another site with multiple homebrews: https://www.bitethechili.com/
Includes ROMs for NES, Atari 2600, Dreamcast, GameBoy Advance and Nintendo DS.

Rodas Cross (demo): https://github.com/kaffeeware/snes_roms
Platform: SNES
Has 3 versions of the demo. They're the .smc files listed in the site.

Auster

The Cowlitz Gamers' Lost Adventure: https://mteegfx.itch.io/lost
Platforms: NES & ZX Spectrum
The ROMs are the .nes (NES) and .tap (ZX Spectrum) files inside the downloadable .zip file.

The Cowlitz Gamers' 2nd Adventure: https://mteegfx.itch.io/cowlitz
Platform: NES
Has 2 ROMs, both with the .nes format. Not sure what's the difference between them. They're included in the "Release Pack" zip file.

Gruniożerca 2: The Great Cavy Rescue!: https://mteegfx.itch.io/grunio2
Platform: NES
The ROM is the .zip file inside the downloadable file "Gruniozerca 2 - The Great Cavy Rescue!.zip".

Gruniożerca 3: The Great Cavy Clean-up!: https://mteegfx.itch.io/grunio3
Platform: NES
The ROM is the .nes file inside the downloadable .zip file.

MW ULTRA: https://protovision.itch.io/mw-ultra
Platform: Commodore 64 & C64 Mini/Maxi
I don't own the game, but it very likely comes with emulatable files for the C64 and C64 Mini/Maxi, likely in the download option "MW ULTRA (C64 files only)".

Galencia for the C64: https://galencia.itch.io/galencia
Platform: Commodore 64
I don't own the game yet so I can't check the files, but it seems it comes with a C64 ROM too.

Neutron: https://sarahjaneavory.itch.io/neutron
Platform: Commodore 64 & C64 Mini/Maxi
Includes 2 ROMs, the .crt and .d64 files (not sure what's the difference between them).

Santron: https://sarahjaneavory.itch.io/santron
Platform: Commodore 64
Includes 2 ROMs, the .prg and .d64 files (not sure what's the difference between them).

Zeta Wing: https://sarahjaneavory.itch.io/zeta-wing
Platform: Commodore 64 & C64 Mini/Maxi
Includes 3 versions of the ROMs. See which fits your needs the most. The ROMs are available in the formats .tap, .prg and .crt.

Heroes & Cowards – The Pentagram of Power: https://protovision.itch.io/heroes-cowards
Platform: Commodore 64 & C64 Mini/Maxi
I don't own the game, but it very likely comes with emulatable files in the download options "Heroes & Cowards (C64).zip" and "Heroes and Cowards (Mini and Maxi files)".

The Camp - Caravan Edition: https://protovision.itch.io/the-camp
Platform: Commodore 64
I don't own the game, but it seems it comes with C64 ROMs, likely in the files with "D64" in the name. Also seems to come with both German and English versions.

Jim Slim: https://protovision.itch.io/jim-slim
Platform: Commodore 64 & C64 Mini/Maxi
I don't own the game, but it seems it comes with emulatable files, likely in the download options with "D64" and "Mini and Maxi files" in the name.

Advanced Space Battle: https://protovision.itch.io/advanced-space-battle
Platform: Commodore 64 & C64 Mini/Maxi
I don't own the game, but it seems it comes with emulatable files, likely in the download options with "D64" and "Mini and Maxi files" in the name.

Stroke World: https://protovision.itch.io/stroke-world
Platform: Commodore 64 & C64 Mini/Maxi
I don't own the game, but it seems it comes with emulatable files, likely in the download options with "D64" and "Mini and Maxi files" in the name.

It's Magic: https://protovision.itch.io/its-magic
Platform: Commodore 64 & C64 Mini/Maxi
I don't own the game, but it seems it comes with emulatable files, likely in the download options with "D64" and "Mini and Maxi files" in the name.

It's Magic 2: https://protovision.itch.io/its-magic-2
Platform: Commodore 64 & C64 Mini/Maxi
I don't own the game, but it seems it comes with emulatable files, likely in the download options with "D64" and "Mini and Maxi files" in the name.

Ice Guys: https://protovision.itch.io/ice-guys
Platform: Commodore 64 & C64 Mini/Maxi
I don't own the game, but it seems it comes with emulatable files, likely in the download options with "D64" and "Mini and Maxi files" in the name.

Tanks 3000: https://protovision.itch.io/tanks-3000
Platform: Commodore 64 & C64 Mini/Maxi
I don't own the game, but it seems it comes with emulatable files, likely in the download options with "D64" and "Mini and Maxi files" in the name.

Team Patrol: https://protovision.itch.io/team-patrol
Platform: Commodore 64
Includes both a demo and a full release. Both .d64 files.

Leisure Suit Leo 2 - The Secret of Maniac Island: https://protovision.itch.io/english-leisure-suit-leo-2
Platform: Commodore 64 & C64 Mini/Maxi
I don't own the game, but it seems it comes with emulatable files, likely in the download options with "D64" and "Mini and Maxi files" in the name. Also seems to come with both German and English versions.

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Another anthology:
Action 53 Volume One Function 16: https://action53.itch.io/vol1
Platform: NES
Multiple games included inside the ROM. The ROM is the .nes file inside the downloadable .zip file.
Games/Tools included in the ROM:

NES15 by Mathew Brenaman
TapeDump by Chris Covell
Driar by David Eriksson and Stefan Adolfsson
Streemerz (after Mr. Podunkian) by Faux Game Co.
Forehead Block Guy by Joshua Hoffman
I Wanna Flip the Sky by Tom Livak
MineShaft by Nioreh
Munchie Attack by Joe Parsell
LAN Master by Shiru
Lawn Mower by Shiru
Zooming Secretary (with PinWizz) by Shiru
NES Virus Cleaner by Sly Dog Studios
Slappin' by Michael Swanson
Concentration Room by Damian Yerrick
Music Toy: Axe by Damian Yerrick
Russian Roulette by Damian Yerrick
Thwaite by Damian Yerrick
Zapper Calibration by Damian Yerrick
ZapPing by Damian Yerrick
Pogo Cats by Yggi

You can probably find most of individual ROMs on either the links in the anthology's page, or at http://forums.nesdev.com/
Sorry, but can't go digging for their individual versions right now.

VictimRLSH

Some Vic-20 (VICE) games on Github

https://github.com/theflyingape/omega-fury/releases/tag/final It's hard to believe that as incredible as the vic-20 version of Omega Race was, it was apparently improved upon.

https://github.com/theflyingape/berzerk-mmx/releases/tag/final A berzerk clone that actually includes the voices!

There are a HUGE number of free and commercial games available from the Vic-20 DENIAL forum, but the proprietor wishes all links to the site to be to the main page. http://sleepingelephant.com/denial/ To find the vic-20 goodies navigate to Forum->Announcement Board. From there, there are threads for new vic-20 releases for each year from 2008 to the present. Many are free.

Folly

@victimrlsh

I tried your games in "VICE standalone" and couldn't directly play them.
I think more people will have the same problem if they try.
I made a small animation for the most important settings you have to do.
( Menu = F12 )

themazingness

Regarding the 50 ROMS from Intellivision Lives!, for some reason the games play fine in RetroArch in Windows 10 but none seem to work on my Pi. I'd be surprised if there isn't a solution, but I haven't found it yet.

Edit: The solution is renaming the BIOS files to all lowercase. They are all uppercase in the PC collection.

Auster

Kumi-Daiko Beatoff 64: https://zhamul.itch.io/kumi-daiko-beatoff-64
Platform: Nintendo 64
The ROM is the .n64 file inside the .zip file that can be downloaded from the option "Kumi-Daiko Beatoff 64 [N64 Rom]".

Siikasaurus: https://zhamul.itch.io/siikasaurus
Platform: PS1/PSX
The ROM are the .cue and .bin files inside the downloadable .zip file.

Sweethearts: https://zhamul.itch.io/sweethearts
Platform: NES
The ROM is the downloadable .nes file.

Tag: https://zhamul.itch.io/tag
Platform: Sega Genesis/Mega Drive
The ROM is the .bin file inside the downloadable .zip file.

Duel: https://zhamul.itch.io/duel
Platform: Sega Genesis/Mega Drive
The ROM is the .bin file inside the downloadable .zip file.

Double Cooked: https://zhamul.itch.io/double-cooked
Platform: Sega Genesis/Mega Drive
Has 2 updates available, v 1.0 and v 1.1, each properly marked in the download options. The ROMs are the .bin files inside each downloadable .zip file.

Heart Knight: https://zhamul.itch.io/heart-knight
Platform: GameBoy
The ROM is the .gb file inside the .zip file that can be downloaded from the option "HeartKnight.zip [GB Rom]".

Woolball's backyard: https://zhamul.itch.io/woolballs-backyard
Platform: GameBoy
The ROM is the .gb file inside the .zip file that can be downloaded from the option "Woolball [Gameboy ROM]".

Poopster: https://zhamul.itch.io/poopster
Platform: GameBoy
The ROM is the .gb file inside the .zip file that can be downloaded from the option "Poopster [Game Boy Rom]".

Overseer: https://zhamul.itch.io/overseer
Platform: Vectrex
The ROM is the .bin file inside the .zip file that can be downloaded from the option "Overseer [Vectrex bin]".

Arcade Legend: https://zhamul.itch.io/arcade-legend
Platform: GameBoy
The ROM is the .gb file inside the .zip file that can be downloaded from the option "Arcade Legend [Game Boy Rom]".

Hyper speed: https://zhamul.itch.io/hyper-speed
Platform: Vectrex
The ROM is the .bin file inside the .zip file that can be downloaded from the option "HyperSpeed [Vectrex bin]".

Telocation: Gemini: https://jtn191.itch.io/telocation-gemini
Platform: Nintendo 64
The ROM is the downloadable .n64 file.

The Last Amazon Trilogy: https://psytronik.itch.io/amazon
Platform: Commodore 64 & C64 Mini/Maxi
Includes multiple ROMs of the series. The ROMs are the .tap, .prg and .d64 files inside the downloadable .zip file.

[German] Crazy News: https://protovision.itch.io/german-crazy-news
Platform: Commodore 64
I don't own the game, but according to the store page, it very likely comes with a C64 ROM. Also, the game appears to be only in German.

Metal Dust: https://protovision.itch.io/metal-dust-c64-supercpu
Platform: Commodore 64 SuperCPU
I don't own the game, but according to the store page, it can be played with emulators, so it comes with a ROM.

Bomb Mania: https://protovision.itch.io/bomb-mania
Platform: Commodore 64 & C64 Mini/Maxi
I don't own the game, but according to the store page, it very likely comes with emulatable files for the C64 and the C64 Mini/Maxi.

Hockey Mania: https://protovision.itch.io/hockey-mania
Platform: Commodore 64 & C64 Mini/Maxi
I don't own the game, but according to the store page, it very likely comes with emulatable files for the C64 and the C64 Mini/Maxi.

Auster

Father's Day: https://quantumsheep.itch.io/fathers-day
Platform: ZX Spectrum
Has 2 versions which are explained in the page's description.
The ROMs are the .tap files inside the downloadable .zip files.

Also includes the source code (the .xml file), which supposedly can be edited and/or compiled to other platforms, as listed in the Lantern engine's site: Amstrad CPC64, Apple IIe, Commodore 64, CP/M, IBM PC/XT, TRS-80 1/3/4, ZX Spectrum and Linux.
But good luck using the engine, as there's hardly anything online about it, leaving a lot to figure out (and I couldn't even make it work natively on Linux).

ts-x

@themazingness said in Where to (legally) acquire content to play on RetroPie:

Regarding the 50 ROMS from Intellivision Lives!, for some reason the games play fine in RetroArch in Windows 10 but none seem to work on my Pi. I'd be surprised if there isn't a solution, but I haven't found it yet.

I can confirm that all ROMS from Intellivision Lives!, as well as those from Intellivision Rocks! and Intellivision Greatest Hits all play fine via jzintv. Not sure about freeintv but I’m assuming there’s a way to get them to work with that core as well.

Folly

@themazingness said in Where to (legally) acquire content to play on RetroPie:

Regarding the 50 ROMS from Intellivision Lives!, for some reason the games play fine in RetroArch in Windows 10 but none seem to work on my Pi. I'd be surprised if there isn't a solution, but I haven't found it yet.

I tested them with "lr-freeintv" and were working.
I extracted them from INTY_LIVES.ISO this with sha1sum :
b2bfdd4d8f3a5a4e56182c81a4709492f9f8607e INTY_LIVES.ISO
If you use the same ISO it should work.

Auster

@auster I just noticed building the romset of Ghosts 'n Goblins from Capcom Arcade Stadium also generates a second ROM, the Japanese version of the same game.

The ROM is the file called "makaimug.zip", which is created in the same folder as "gng.zip".

According to MAME 2003's dat file, the Japanese name and version of the game is Makai-Mura (Japan Revision G).

I didn't check the other versions of MAME, but it should work fine with MAME 2003.

themazingness

Data East Retro Classix are a series of arcade games released on Steam. They include games like Bad Dudes, Burger Time, and Joe & Mac. I have only tested two games so far, but both worked as-is. Bad Dudes worked in Final Burn Neo (first one tried) and Gate of Doom worked in MAME 2013 (second one tried since Final Burn Neo failed). Edit: Joe & Mac - Caveman Ninja worked in MAME 2013 as well. Testing has only been done in RetroArch for Windows, however.

For the full list, see here: https://store.steampowered.com/search/?developer=Data East

The .zip roms are the located in \steamapps\common\Retro Classix game name\Retro Classix game name_Data\StreamingAssets.

Now is a good time to get them since it is Steam's summer sale. Though the newly released ones don't have as heavy a discount as the ones that were released a while ago.

On that note, now is a good time to get many of the games mentioned in this discussion if they are on Steam, GoG, or Humble Bundle (all are having their summer sales). Edit: And itch.io too!

Clyde

@themazingness said in Where to (legally) acquire content to play on RetroPie:

For the full list, see here: https://store.steampowered.com/search/?developer=Data East

On GOG: https://www.gog.com/games?search=data+east

Auster

The Weeping Statue: https://brotatofarm.itch.io/the-weeping-statue
Platform: GameBoy
The ROM is the .gb file inside the downloadable .zip file.

TOURMALINE: https://retrosouls.itch.io/tourmaline
Platform: Sega Genesis/Mega Drive
The ROM is the .bin file inside the downloadable .zip file.

And some MS-DOS games that are getting delisted on the 28th and they're 75% off below:

Ultima Underworld 1+2: https://www.gog.com/game/ultima_underworld_1_2
Apparently also available on Origin.

Syndicate Plus: https://www.gog.com/game/syndicate
Includes the expansion, which apparently isn't available anywhere else.

Syndicate Wars: https://www.gog.com/game/syndicate_wars
Apparently it isn't available anywhere else currently.

themazingness

@auster Wait, how did you find out they are getting delisted? What about the other Ultima games? I have these two and the freebies on GoG, but not the other Ultima games yet.

Clyde

@themazingness A quick web search shows it on many gaming news sites:

https://www.startpage.com/do/search?query=ultima+gog+delisted

The source is this GOG forum thread:

https://www.gog.com/forum/general/ultima_underworld_12_syndicate_plus_and_syndicate_wars_delisting/

Quote: "on publisher's request" – So EA is pulling the games from GOG for yet unknown reasons (some of said news sites mention that EA didn't answer them to this question).

edit: Just bought Syndicate Plus & Wars at the current discount of -74%. I already owned UU 1+2. As with past delisted games, they'll remain in your game library after purchase.

Thanks to Auster for bringing this up!

Auster

@themazingness Sorry for the delay, but it's as clyde said, I got the info from the GOG forums. Lately, the GOG staff has been announcing game removals at least a few hours before it's done. It's a bit hard to spot due to the forum's layout, but these removal posts are always stickied/pinned posts until the game gets removed, so if any game's on countdown to be removed, you can just look for "sticky" with ctrl f or similar functions and you'll find their posts.

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More games:

Little Nemo: The Slumberland Hero: https://pearacidic.itch.io/little-nemo-the-slumberland-hero
Platform: GameBoy
The ROM is the downloadable .gb file.

Light Below The Surface: https://pearacidic.itch.io/light-below-the-surface
Platform: GameBoy
The ROM is the .gb file inside the downloadable .zip file.

Phantom Fright: https://bendianaj.itch.io/phantom-fright
Platform: GameBoy
The ROM is the downloadable .gb file.

Monstoria: https://lukepixels.itch.io/monstoria
Platform: NES
Comes with two .nes ROMs, one inside a downloadable .rar file and one that's uncompressed and ready to be used. Not sure what's the difference between them, and maybe they have multiple languages, but I can't check right now.

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And another anthology:

Double Action 53: Volume 2: https://action53.itch.io/vol2
Platform: NES
Multiple games included inside the ROM. The ROM is the .nes file inside the downloadable .zip file.
You can probably find most of the games included as individual ROMs on either the links in the anthology's page, or at http://forums.nesdev.com/
Games/Tools included in the ROM:

Super PakPak
Solar Wars
Function
MilioNESy
Conway's Life
Double Action Blaster Guys
Sliding Blaster
Auge
Love Story
Theremin
Sgt. Helmet – Training Day
Sir Ababol
PCB Artist
Chase
2048
1007 Bolts
RHDE: Furniture Fight
robotfindskitten
Sound Effect Editor

Auster

First, a question:

Would it be interesting to list games made in the RPG Maker 2000 and 2003 engines, in case the Easy RPG core from Retroarch gets ported to RetroPie? Or would it be best not to, either because no emulator is available on RetroPie yet, or, like with MS-DOS, there are too many games to list?

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Now some more games:

Nixy The Glade Sprite: https://psytronik.itch.io/nixy-c64
Platform: Commodore 64 & C64 Mini/Maxi
I don't own the game, but the list of downloadable files mentions the extensions, .crt, .prg, .d64 and .tap, all compatible with C64 emulators.

Putrid Shark: https://worsterman.itch.io/putrid-shark
Platform: GameBoy
The ROM is the downloadable .gb file.

YUFFIEZRE@LM: Gal Engine (demo): https://annunakigirlfriend.itch.io/yuffiezrealm
Platform: GameBoy
The ROM is the downloadable .gb file.

Guardians Of Sunshine: https://seirufy.itch.io/guardians-of-sunshine-game-boy
Platform: GameBoy
The ROM is the downloadable .gb file.

Wizard of Wor: https://lacoste42.itch.io/wizard-of-wor-gameboy-color
Platform: GameBoy Color/GBC
The ROM is the downloadable .gbc file. Also includes a .cia file (3DS package installer), but it's just the GBC version wrapped to run in the 3DS with its native emulator.

Alice Madness Returns (fan game): https://seirufy.itch.io/alice-madness-returns-game-boy
Platform: GameBoy
The ROM is the downloadable .gb file.

Bandits at Zero: https://lacoste42.itch.io/bandits-at-zero
Platform: GameBoy Color/GBC
The ROM is the downloadable .gbc file. Also includes a .cia file (3DS package installer), but it's just the GBC version wrapped to run in the 3DS with its native emulator.

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And another anthology:

Action 53 Vol. 3: Revenge of the Twins: https://action53.itch.io/vol3
Platform: NES
Multiple games included inside the ROM. The ROM is the .nes file inside the downloadable .zip file.
You can probably find most of the games included as individual ROMs on either the links in the anthology's page, or at http://forums.nesdev.com/
Games/Tools included in the ROM:

Nebs 'n Debs (Prequel / Demo)
Brick Breaker
Waddles the Duck
Flappy Jack
Rock Paper Scissors Lizard Sbock
Super Tilt Bro.
Twin Dragons (NesDev Competition Version)
Sinking Feeling
Filthy Kitchen
Karate Kick
Cheril the Goddess
Lala the Magical
Wo xiang niào niào
Zombie Calavera (Prologue)
Jupiter Scope 2: Operation Europa
Lunar Limit
Ralph 4
Button Logger
Musical Controller
Spacey McRacey
240p Test Suite
Haunted: Halloween '85 (Demo)
The Paths of Bridewell

Auster

@auster said in Where to (legally) acquire content to play on RetroPie:

Ghosts 'n Goblins, which is a DLC for the free app Capcom Arcade Stadium, comes with an arcade rom

Update about it: it seems Capcom locked the DLC files, so you can no longer build ROMs from it.

Clyde

@auster said in Where to (legally) acquire content to play on RetroPie:

First, a question:

Would it be interesting to list games made in the RPG Maker 2000 and 2003 engines, in case the Easy RPG core from Retroarch gets ported to RetroPie? Or would it be best not to, either because no emulator is available on RetroPie yet, or, like with MS-DOS, there are too many games to list?

I'd endorse the latter, as I'm only interested in games that are directly supported by the current RetroPie. And systems like DOS or custom game engines would blow up the list unproportionally. Just my two cents.