Am sure that some people have been asked this question, and my researches yields a no, but I want to know from here. Do I have to credit the owner of a free asset that I used for my project from the unity asset store? Example: if I download a model from the unity asset store and use it in a game design, do I have to give credits to the person that provided the model on the asset store? Like this: https://assetstore.unity.com/packages/3d/characters/humanoids/scifi-robots-113422
I'm assuming that by "free asset", you mean an asset available on the unity Asset Store that is shown when filtering by "free" (resulting in something like this).
It will depend on the asset. For instance:
It's unfortunate that the Asset Store page does not provide a clear "license" section. Until they add this, I'm afraid you'll have to search and ask for each asset.