Well, on the game's description page you put the name of the asset file. Did you put more information anywhere else? As you cite, you need to give appropriate credit, link to the licence and indicate if changes are made. I didn't find any of the last three. Did I overlook something? Sorry if I did.
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No worries. There were no changes made so didn't have to indicate that. Appropriate credit I gave by giving the full asset file name containing the creator name and the name of the asset (as opposed to just the creator and asset name separately which would make it harder for you to find). And the link to the licence can be made 'in any reasonable manner' and that was done by naming the asset file, the page of which contains the licence (as you know because that's how you found it). Thanks.
And here's the licence if you couldn't find the link on the asset page on freesound.org (where I stated that the asset came from) https://creativecommons.org/licenses/by-nc/3.0/legalcode . This licence is applicable to all sounds on freesound.org which as I say I put a link to. Thanks.
What I was trying to say is that these information should be included in your game or description page without having to use help, in this case google or another search engine. At least as far as I understand it, I'm not a lawyer. Please see here for some actual examples how to properly give attribution:
https://wiki.creativecommons.org/wiki/best_practices_for_attribution#Examples_of...