I have tried to research an answer to this question but Google comes out nada.

I am in a position where I can fund my indie game, instead of relying on rev-share work. However, my sound designer is on a revenue-share basis but I do love his sound design, and I want to start paying him for his work.

The problem is - I have changed my indie game from a platformer to an RPG, so the existing sound effects that he made wouldn't be used.

Is it possible to move such an arrangement, and has it been done before?

6 hours ago, Envy123 said:

Is it possible to move such an arrangement, and has it been done before?

Those are the wrong questions. The question you should be asking is "how." The answer is "with a lawyer's help."

If you've changed the project completely and aren't using any of the old work, it sounds like you can probably just make a new agreement...

If you've previously put things in writing Tom is correct though: ask your lawyer.