Unfortunately, there's no real workaround other than contacting the owners of the products you licensed whose license doesn't already specify they can be freely distributed. Even if in YOUR license it says that they're not allowed to touch that stuff, your still distributing other pieces of software without being allowed to.

Though there is one solution which would save you a lot of time and would also make it harder for people to just copy your game outright. Put all the purchased and downloaded assets and the like in a separate folder in your project, then when it's time to upload your project to wherever you're hosting the source (I'm assuming GitHub?) just exclude that folder. If you still want to make it easy for others to figure out, just post a list of all dependencies in your readme. Or write a bit of code that does that for you.

Good luck!

Unfortunately, there's no real workaround other than contacting the owners of the products you licensed whose license doesn't already specify they can be freely distributed. Even if in YOUR license it says that they're not allowed to touch that stuff, you're still distributing other pieces of software without being allowed to.

There is one solution which would save you a lot of time and would also make it harder for people to just copy your game outright. Put all the purchased and downloaded assets and the like in a separate folder in your project, then when it's time to upload your project to wherever you're hosting the source (I'm assuming GitHub?) just exclude that folder. If you still want to make it easy for others to figure out, just post a list of all dependencies in your readme. Or write a bit of code that does that for you.

Good luck!