If you never distribute the files in your game or project, then you don't have to make them available. If you distribute the sounds in your game, they must be publicly available to people in some fashion.
Assuming you'll be distributing them in some fasion, the files have to be easily available* to people and it must be clear what license the files are under, and they should be accessible without people paying for them. That doesn't mean you can't charge money for your game, the files can be packaged with a commercial game, but these files must also be available in some other fasion as well. One that doesn't involve a paywall.
*"easily available" means you can't just say "you can use the files if you can find a way to extract them from my compiled unity package. Good luck, suckers!" You should list them in the credits, and also indicate a simple way for people to access them so people can get them without using special extraction tools. If you can't distribute the files as plain ol' files within a freely available game,then you'll need to make them available in some other way. For example, if you sell your game on itch.io or steam, make an additional asset pack download:
"Skate-comment-and-survive, arcade edition! $12.99 [purchase and download]" (contains game + CC-BY-SA sound files)
"Free SC&S assets, $0.00 [download]" (contains just the CC-BY-SA sound files.)
One obvious alternative to all this is sharing them on OGA, but if the changes you make to the original file are trivial, we consider it effectively the same asset that is already present on OGA and we ask that you do not upload duplicates. What sort of alterations are you thinking of? It may help me understand how to simplify the requirements you'll need to adhere to.
"Share Alike" means if you take these sounds and change or adapt them into new sounds, the new sounds must also be under the same license. You are sharing your adaptations in the same way the original sounds were shared. aka sharing alike. Let me know if you have additional questions. :)
Ok, all the links are reworked. The only things I wasn't able to recover were a few tarballs, .zips and some links to html tools. If surt or anyone else happens to have the missing parts, send them to me and I'll fix those too.
I hope this works out for you, but most of the issues you're working through have little to do with OGA, so there is almost nothing we can advise you on more than what has already been said.
"...I got in touch about it and will come back here with an answer so that other users don't have to go through this kind of situation..."
Thanks. But other users already don't have to go through this situation for the assets in question. I mean, you don't have to go through this situation either, but it sounds like your publisher(?) is convinced otherwise.
Your plan sounds perfectly fine to me. Honestly, you can't be responsible for someone else's misunderstand about licenses, but it's also a good idea to have good relationships with your artists, even if you are well within your rights to do something they may not like. Hopefully you will hear back from this author soon and they'll agree that selling your project containing their derived assets is fine with them.
The assets here on OGA that indicate a CC0 license do not forbid reselling. You should probably make contributions to add value if you plan to resell assets found here though. Just scraping the site to flip free assets for a quick buck is pretty rude, but it doesn't sound like that's your plan.
If the submitter stated the assets on their website cannot be resold, then the assets on their website are NOT cc0 licensed. They may be a separate "premium" version of the assets found here... Or the submitter may simply be mistaken about CC0. If resale is forbidden, then it isn't actually a CC0 license. Assets found on OGA should not be treated as the same as assets that look similar elsewhere. That author's assets on OGA are CC0, regardless of what other sites say about separate copies hosted elsewhere.
If you never distribute the files in your game or project, then you don't have to make them available. If you distribute the sounds in your game, they must be publicly available to people in some fashion.
Assuming you'll be distributing them in some fasion, the files have to be easily available* to people and it must be clear what license the files are under, and they should be accessible without people paying for them. That doesn't mean you can't charge money for your game, the files can be packaged with a commercial game, but these files must also be available in some other fasion as well. One that doesn't involve a paywall.
*"easily available" means you can't just say "you can use the files if you can find a way to extract them from my compiled unity package. Good luck, suckers!" You should list them in the credits, and also indicate a simple way for people to access them so people can get them without using special extraction tools. If you can't distribute the files as plain ol' files within a freely available game, then you'll need to make them available in some other way. For example, if you sell your game on itch.io or steam, make an additional asset pack download:
One obvious alternative to all this is sharing them on OGA, but if the changes you make to the original file are trivial, we consider it effectively the same asset that is already present on OGA and we ask that you do not upload duplicates. What sort of alterations are you thinking of? It may help me understand how to simplify the requirements you'll need to adhere to.
@crizp: see this example for how to credit. https://opengameart.org/content/faq#q-how-to-credit
"Share Alike" means if you take these sounds and change or adapt them into new sounds, the new sounds must also be under the same license. You are sharing your adaptations in the same way the original sounds were shared. aka sharing alike. Let me know if you have additional questions. :)
Ooh, nice.
Page bookmarked.
Ok, all the links are reworked. The only things I wasn't able to recover were a few tarballs, .zips and some links to html tools. If surt or anyone else happens to have the missing parts, send them to me and I'll fix those too.
I hope this works out for you, but most of the issues you're working through have little to do with OGA, so there is almost nothing we can advise you on more than what has already been said.
Thanks. But other users already don't have to go through this situation for the assets in question. I mean, you don't have to go through this situation either, but it sounds like your publisher(?) is convinced otherwise.
All the assets are available, but I have yet to rework all the links in this thread. Thought you might like to know.
A few hours I think
Nah, I have them all. I just haven't finished organizing them yet. I'll be uploading them all soon and redirecting the broken links to the local copy.
Your plan sounds perfectly fine to me. Honestly, you can't be responsible for someone else's misunderstand about licenses, but it's also a good idea to have good relationships with your artists, even if you are well within your rights to do something they may not like. Hopefully you will hear back from this author soon and they'll agree that selling your project containing their derived assets is fine with them.
The assets here on OGA that indicate a CC0 license do not forbid reselling. You should probably make contributions to add value if you plan to resell assets found here though. Just scraping the site to flip free assets for a quick buck is pretty rude, but it doesn't sound like that's your plan.
If the submitter stated the assets on their website cannot be resold, then the assets on their website are NOT cc0 licensed. They may be a separate "premium" version of the assets found here... Or the submitter may simply be mistaken about CC0. If resale is forbidden, then it isn't actually a CC0 license. Assets found on OGA should not be treated as the same as assets that look similar elsewhere. That author's assets on OGA are CC0, regardless of what other sites say about separate copies hosted elsewhere.
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