neil9000

I'm not sure why that has happened but it's like that for me also. You can highlight both games, right click one and choose the combine option to fix it though.

Yup, you can also just type *.gdi into your explorer window for your Dreamcast rom folder, and then just drag and drop the results onto the Launchbox window. Glad you are sorted though.

Also i will add a second issue with your files, they are badly named the version info like v1.000 should be in brackets like this (v1.000), the way your files are named means that it is highly likely that metadata and images will not be scraped for your Dreamcast games.

You have some real weird file types there, but in essence in your images of the ones that dont launch you only want to import the .gdi file, my guess is you just threw the folders at Launchbox and just expected it to know the correct file to launch, but thats not how it works. So for the games that dont launch you will want to edit them to point to the correct file, or just delete them all and re-import, this time with the correct files.

Ill also add here, a 2016 MAME romet will have completely different neogeo bios as well as a completely different qsound file for all Capcom games, so if your romset is not matching your specific emulator there could be a ton of issues here. Also a 2016 romset is possibly from before when they started allowing the dinput commandline we use by default when importing mame, so that may also be breaking things. Any reason why you just havent got the brand new current set, and instead downloaded a troublesome amalgamation one that isnt officially from MAME themselves?

That page no longer exists, hence the error you see. If I recall the uploader removed it themselves, so I wouldn't expect a re-upload I'm afraid.

You want this specific option selected.

Yeah, definitely sounds like you didnt import a full romset using that specific importer, correct?

There is a option when just importing files and not using the fullset importer to "import games using mame metadata" or similar, you need that checked in the import wizard.

And i'm sure it will be, but it is the holidays, so a little patience may be required.

Redream does not support Naomi games. As for the original post, the error is clearly your bios, either it is missing completely, or you are missing specific files within it. If you load the core in Retroarch and head to the information section it will tell you what bios are required, and if it see's them or not. You need the naomi.zip bios, i would guess the most recent one from the current MAME romset is the one the core would want, so even if you have bios it may be old and out of date, This is the contents of the naomi.zip from the 0.236 MAME romset, which is the newest set i have.

The names have to EXACTLY match, yours do not. In the below image i renamed my rom to match what the Retro Achievements call it, and i have Achievements in Launchbox.

Can i ask what Launchbox versions you are both using? Amazon/Twitch did change something recently that meant new games were not detected, but that was fixed in a previous Launchbox version, at least for me and the other person who noticed games missing.

Fixed this on Discord. For those wondering Retroarch was set to extract roms in Launchbox, which will break loading it in MAME, as they need to remain zipped if from the actual MAME romset.

Have a look at the "View" dropdown at the top of the window and check that you are not hiding games missing certain types of media.

Click a game in that system, then CTRL-A to highlight them all, then head to tools/File Management/Change Rom Path For Selected Games, and point it to the correct folder.

He wants to see this screen, or at least for you to check it to see if the path is correct.

Not really, you could uncheck the "dont import non working games" checkbox in the import wizard, but that would cause you to have tons of files imported that do not work. You could also try this plugin.

MAME doesnt emulate Naomi or Atomiswave, you need to use a Dreamcast emulator like Demul or the Flycast core in Retroarch. As they are marked as non working by MAME itself they are not imported by default.

Click a game in the platform, then CTRL-A to highlight them all, right click one and choose bulk edit, then in the dropdown choose the option to disable them.

Short answer, no. Long answer, LaunchBox Games Database (launchbox-app.com)

You need a paid premium subscription at emumovies in order to download gameplay videos in Launchbox. Donation Options - EmuMovies

Are you sure you extracted the theme correctly? It should be a folder with the theme name and some files and folders inside that. Sometimes people extract archives to a folder with the same name as the archive, so in that case your folder structure would be "Name Of Theme/Name Of Theme/files and folders" and that wouldn't work as the needed files and folders are not in the parent folder. Also its worth noting that all themes have to support the text list view as it is required, a lot of the time theme makers leave that view as is and don't theme it at all. So if you are already on the text list view, switching to a new theme you would still be on that view, and that may look the same if not themed by the theme maker, you would just need to "Switch View" to find the one you want. I would recommend going to controller mappings and mapping two buttons to your controller, "Change Theme" and "Change View" those can then be used from anywhere in the UI to quickly pick themes and specific views for them.