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There are too many outdated torrents and information, and the CHDs torrent generated by archive.org has garbage padding files and only has files up to 0-9A-C.

I am tired of it and I know you are too, so here are the latest.

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LATEST FULL TORRENTS AS OF 2022-MAY (MAME 0.243):

Magnet links:
0.243 CHDs (Full 585.25GB torrent, 100+ seeds):
magnet:?xt=urn:btih:e5aee5d6a78637d2f2bcb1349f876778520943cb&dn=MAME%200.243%20CHDs%20(merged)&tr=http://tracker.opentrackr.org:1337/announce

0.243 ROMs (Merged, 70.21GB torrent, 100+ seeds):
magnet:?xt=urn:btih:4daf78d230c4745d836d79c2e7216a2930d5fb15&dn=MAME%200.243%20ROMs%20(merged)&tr=http://tracker.opentrackr.org:1337/announce

0.242 EXTRAs (artwork/cheats/snap/titles/manuals/etc, 64.31GB torrent, 100+ seeds):
magnet:?xt=urn:btih:67189b08addd7dd1675141f8060650de668e24f8&tr=http://tracker.opentrackr.org:1337/announce

.torrents files:
0.243 CHDs (Full 585.25GB torrent, 100+ seeds):
https://archive.org/download/mame-chds-roms-extras-complete/MAME%200.243%20CHDs%20%28merged%29%20Full%20585.25GB.torrent

0.243 ROMs (Merged, 70.21GB torrent, 100+ seeds):
https://archive.org/download/mame-chds-roms-extras-complete/MAME%200.243%20ROMs%20%28merged%29%20Full%2070.21GB.torrent

0.242 EXTRAs (artwork/cheats/snap/titles/manuals/etc, 64.31GB torrent, 100+ seeds):
https://archive.org/download/mame-chds-roms-extras-complete/MAME%200.242%20EXTRAs%20%28artwork%2Ccheats%2Csnap%2Ctitles%2Cmanuals%2Cetc%29%20Full%2064.31GB.torrent

File list:
https://archive.org/download/mame-chds-roms-extras-complete

Tracker with the most seeds (100+):
http://tracker.opentrackr.org:1337/announce

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QUICK HOW TO GUIDE AS OF 2022-MAY (MAME 0.243):

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STEP 1 - Basics
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Know that:
a) MAME considers CHD files as ROM files, CHDs are just bigger ROMs
b) MAME doesn't care where you put the CHDs or ROMs as long as all ROMs/CHDs directories are added to the rom path configuration.
c) That means you can add the torrent directories to MAME, and update MAME's database while ROMs/CHDs are being downloaded one by one, you can also pick which ROMs to download first, read how to do this below.

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STEP 2 - Download the ROMs and CHDs
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a) Install and run qBittorrent ( https://www.qbittorrent.org/ )
b) In qBittorrent, click [open url] or [add magnet link], a box will pop up.
c) Paste into the box the two magnet links from above, one line per link ( magnet:?xt=urn:btih:xxxxxxxxxxxxx... )
d) Click [Download] or [OK] to close the box.
e) You should now see in the qBittorent [Transfers] tab there are two torrents being added, [MAME 0.2xx ROMs (merged)] and [MAME 0.2xx CHDs (merged)].
f) If you have waited for a minute and the torrents are not downloading, manually add a torrent tracker to each torrent, so that qBittorrent knows what peers/seeds to download from, do this by:
i) From qBittorrent [Transfers] tab, select one of the torent ([MAME 0.2xx ROMs (merged)] or [MAME 0.2xx CHDs (merged)])
ii) Click the [Trackers] tab (between [General] and [Peers])
iii) Right click anywhere in the tracker list for a pop-up menu
iv) Click [Add a new tracker...], a box [List of trackers to add] will pop up.
v) Paste the following tracker URL into the box and press [OK]:
http://tracker.opentrackr.org:1337/announce
vi) You should now see [http://tracker.opentrackr.org:1337/announce] in the tracker list, watch the [Peers] and [Seeds] column, there should be more than 100.
vii) Do this once for the ROMs torrent and once for the CHDs torrent.
g) Continue to the next step while the torrents are downloading.

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STEP 3 - Find out where the ROMs/CHDs .zip files are downloaded to
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There are 2 paths: The ROMs (70+GB) and The CHDs (500+GB). Do these steps to find both:
a) In qBittorrent: In the [Transfers] tab, right click the torrent name [MAME 0.2xx ROMs (merged)] or [MAME 0.2xx CHDs (merged)], you should see a small pop-up menu.
b) Left click [Open destination folder], a file manager should pop up.
c) In the file manager, look at the directory location ('directory' is also called 'folder' in windows).
d) Do it once for the ROMs and once for the CHDs, remember these 2 directories for the next step.

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STEP 4 - Add BOTH ROMs and CHDs directories to MAME
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Set MAME's ROMs directory to the two directories qBittorrent is downloading to:
a) Go to MAME's main screen (restart MAME if not sure)
b) Click [Configure Options]
c) Click [Configure Directories]
d) Click [ROMs]
e) Click [Add Folder]
f) Browse the directory tree using the [UP/DOWN/ENTER] key to select the correct directory from [Step 3] above.
e) Once you find the final correct directory, just highlighting it is not enough, you must press [Enter] to enter it first, otherwise you'll just set the parent directory instead.
f) Once INSIDE the correct directory, press the [TAB] key on your keyboard to set the directory in MAME.
g) Click [Return to Previous Menu]
h) Click [Save Configuration]
i) Do this once for the ROMs directory and once for the CHDs directory. You need to add both directories (from STEP 3) for all ROMs to work.

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STEP 5 - Decide on what ROMs to download and how often do you run audits in MAME
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Now that the ROMs/CHDs are downloading and the correct MAME directories are configured, you want to audit the download directories in MAME so that it will find all the newly downlodaded ROMs/CHDs .zip files.

During the audit, MAME will find the newly downloaded ROMs/CHDs .zip files and update MAME's internal database, newly downloaded ROMs/CHDs will show up in the [Available] section in MAME.

Depending on your goal and available time/bandwidth, you have 3 options:
a) Slow + Complete:
Wait for all ROMs/CHDs to be downloaded and update MAME database once (this takes much longer to see the ROMs from MAME because the file pieces are downloaded randomly across all files); or

b) Quick:
You only select a few favorite ROMs/CHDs to be downloaded, then update MAME database. You do this by going to qBittorrent, in 'Transfers' tab left click a torrent (ROMs or CHDs), click the 'Content' Tab, Tick/Untick ROMs/CHDs to download/not download (e.g. only tick 1941.zip, everything else unticked); or

c) Quick + Complete (Recommended):
You select all ROMs/CHDs to be downloaded, but you also enable 'Download in sequential order', so that all ROMs/CHDs will be downloaded one by one. Set your favorite ROMs/CHDs .zip to 'Maximum' priority so your favorite ROMs/CHDs will be downloaded first. Update MAME database once in a while after a new bunch of ROMs/CHDs are downloaded. You get the best of both worlds. Do this by:

i) Configure qBittorrent to download .zip files one by one:
In qBittorrent 'Transfers' tab, right click a torrent, then select [torrent options...], then tick [Download in sequential order]. Do this once for the ROMs torrent and once for the CHDs torrent.

ii) Configure qBittorrent to download your favorite ROMs first:
In qBittorrent 'Transfers' tab, left click a torrent (ROMs or CHDs), click the 'Content' tab, find your favorite ROM/CHD file (e.g. 1941.zip) and click on 'Normal' in the Download Priority column, it'll pop up a selection of [Do not download/Normal/High/Maximum], select [Maximum]. Do this to EACH ROM/CHD .zip file you want to complete download first. (e.g. 1941.zip is on 'Maximum' priority while everything else is on 'Normal' priority)

This combination allows you to download ALL ROMs/CHDs sequentially one by one, and allow you to play your favorite ROMs first.

Each time one or a bunch of the ROM/CHD .zip reaches 100% download, you can audit the download directories for MAME to add the new ROMs to the [Availabe] section, which brings us to the next step.

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STEP 6 - Audit the ROMs/CHDs and update the MAME database
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a) (In MAME window) Click the magnifying glass and select [Audit media for all 38967 machines]
b) Wait for MAME to audit both ROMs and CHDs directories
c) The newly downloaded ROMs/CHDs will now show up in the [Available] section.
d) For subsequent audits, select [Audit media for X machines marked unavailable] instead to skip the known completed ROMs to reduce audit time.

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STEP 7 (optional) - Install MAME Extras
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You can add extras such as in-game/title screenshots (snap/titles), cheats, etc to your MAME installation, you have two options:

a) The hard way:
Download and install each extras component manually and set up your own perfect MAME, e.g., goto https://www.progettosnaps.net/snapshots/ and download [Snap > Full-Set 0.240 (pS_snap_full_240.zip)] and [Titles > Full-Set 0.240 (pS_titles_full_240.zip)] and the smaller 0.24x update packages. Decompress the snap zip, find the directory with 40000 .png files, move all the .png to MAME's [snap] directory. Decompress the titles zip, find the directory with 40000 .png files, move all the .png to MAME's [titles] directory. snap and title .png files have the exact same filename, don't mix them up. Get the cheat.zip from ( http://cheat.retrogames.com/mame_downloads.htm ), decompress it to MAME's cheat directory. You can also manually download and install the latest cabinet/flyers/manuals/etc. This method is too complex and time consuming for the average MAME user, and is only recommdned for experts chasing after the absolute latest. For everyone else, wait a while for the new version of EXTRAs torrent to be released (see 'The easy way' below).

b) The easy way (Recommended):
Get all the cabinet/cheats/manuals/snap/titles etc from a single [MAME Extras] torrent, it is not updated as regularly as MAME binary/ROMs/CHDs, but this way will save you a lot of work.

Currently the MAME Extras torrent is at 0.242, while MAME is 0.243, so it is not that far behind. It'll still work, you just see blank title/snap images on the newest ROMs. To do this:

a) Goto https://pleasuredome.github.io/pleasuredome/mame/
Scroll to [MAME EXTRAs full sets:] > [MAME EXTRAs/Set:].
Click on [MAME 0.242 EXTRAs], it'll jump to a page with a magnet link. Currently it contains the magnet link:
magnet:?xt=urn:btih:67189b08addd7dd1675141f8060650de668e24f8

b) Copy this link, goto qBittorrent, click [Open URL] and paste the link, click [OK], wait for the files to complete download

c) Set cheat.zip, snap.zip and titles.zip to [Maximum] priority if you want them to complete first.

d) Decompress the cheat.zip/titles.zip/snap.zip etc to MAME's root directory, it'll create the correct sub directories.

e) Restart MAME and check the result. If you don't see the cheat/title/snaps, double check that the decompressed directories and MAME directories configuration are the same, often the extra sub directories from the .zip aren't needed, so you move the files one parent directory above (\snap\snap to just \snap, \cheat\cheatxxxx to just \cheat).

f) To enable cheats:
i) (In MAME's main window) Click [Configure Options]
ii) Click [Miscellaneous Options]
iii) Set [Cheats] to [On]
iv) Click [Return to Previous Menu]
v) Click [Save Configuration]
vi) From now on when you are playing a ROM, press the [TAB] key and you should see [Cheat] in the menu.

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STEP 8 - Play and enjoy
================================================================================
That's it, play your favorite ROMs and enjoy.

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Credits to pleasuredome for the magnet links, it also has a lot of other MAME data sets:
https://pleasuredome.github.io/pleasuredome/mame/
Guide by Rompacker:
https://archive.org/details/@rompacker
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Thank you very much, it is good to collect any missing CHD's from a collection but the torrent itself is missing most of the files.

Certainly better life out there then your broken files and unwillingness to fix it. The internet has gone to total shit since you smartphone idiots have taken it over. I'd love to put you all in a room and set it on fire and I don't take that lightly.

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This is how you extract the video files from this post.

Download chdman (with MAME) from:
https://github.com/mamedev/mame/releases/tag/mame0239

To convert the CHD file to MDF:
chdman extractraw -i "input_file_chd.chd" -o "output_file_raw.mdf"

If you don't have PowerIso, or Daemon Tools, or FantomCD, or UltraISO, or ImDisk, or CloneCD, or cdrtools...

Download iat (Iso9660 Analyzer Tool) from:
https://sourceforge.net/projects/iat.berlios/files/iat-0.1.7.win32.zip/download

Use iat to convert the MDF content to ISO (only if necessary as the content may already be in ISO format):
iat -i "input_file_raw.mdf" --iso -o "output_file_iso.iso"

Download 7zip from:
https://sourceforge.net/projects/sevenzip/

Use 7zip to extract the ISO content:
7z x "-oOutput Folder\" -tudf "file_iso.iso"

Note: The files are not corrupted. What is happening is that the built-in player is having trouble decoding the videos. All video files are in good condition. Thanks for sharing, @lollo_220


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Get a life instead of complaining on an archiver website.

As of Nov 16, 2021 with 0.237 out just assuming its current because uploaders note on roms release saying # is because of archive org requiring requesting rename each release.

However, glaring red flag.
This says its almost 600 gigs, however the torrent is only 78 gigs and only includes A-C .. essentially missing everything.

Please fix. thanks !

why files are corrupted ?
videos is corrupt .is it me or everybody issues ?

Full instuction please!

Thank you to whomever uploaded this set, much appreciated.
#1 - Using the "Free Download Manager" I can only get 1 file at a time no matter what I do. Is there another download manage that's known to work to grab all files?
#2 - What's the deal with all the Women Playing at the Beach videos, MPGs, and H264s?
Thanks

Why does this kind of stuff still happen? It's been happening for at least ten years. So annoying.

Settings --> General --> Click on "Browse" next to your current download folder --> Check/uncheck "Subfolder by package" --> Save

I'm using J2Downloader, and it's downloading the files, not the folders.

Thank you very much for uploading the updated mame roms chd 231 where I can download the torrent I do not see a link thank you very much !!

same remark as Reviewer: Etienne66 - January 5, 2021
The torrent file is only for a small subset

MAME_0.225_CHDs_merged_archive.torrent, is only for a small subset of CHDs from 2spicy to cfield with a lot of padding files.
Is it possible to complete the torrent list to ZZZZ :-)

Thank you in advance.

@Jiro101 i tried to download area51mx.chd and i had no problem so i can't tell you why

@Blackbird_tg i had already answered this question, i haven't idea why this site has created the torrent only up to cfield, perhaps for a matter of total weight of the files? i am not able to fix the situation, and the famous padding files i read that are created automatically by the site, i didn't put them. i imagine you have to take one folder at a time, at least for now. for finish i haven't yet figured out if creating a torrent from my computer and uploading it here then he takes it as seeding from my computer or from the site

@Sjors2612 thanky you too! i checked just now and i can confirm you that the file is only biofreak.chd. i have uploaded only and exclusively the chd files in their respective folders. evidently is the site that elaborated the uploaded files (speaking of chd in the official version biofreak is composed only of the biofreak.chd file). of course this applies to all the other chd that i uploaded at the end of 2020 (only chd files, all other files are not needed. i have never extracted a chd of the mame)

you have a good day!

Thank you ver much Lollo, very happy with this set!

Question, is the Biofreak folder supposed to be as is? It contains the biofreak.chd file and another folder with again the biofreak.chd file and 2 .text files named 'b' and 'f'.
(new at this and just want to make sure it is okay :))

Hi, I guess you have damage files, when I reach 99% the download no longer progresses, the missing files are: area51mx\area51mx.chd

AVE

why do you indicate the wrong set roms?

The torrent file, MAME_0.225_CHDs_merged_archive.torrent, is only for a small subset of CHDs from 2spicy to cfield with a lot of padding files.

Is this really the .227 CHD set or is this .225 as indicated in the archive?