again, get a lawyer. But out of interest: * are your "agreements" a legal contract, or verbal? Are you an employee or a contractor? * what are the terms wrt

again, get a lawyer. But out of interest: * are your "agreements" a legal contract, or verbal? Are you an employee or a contractor? * what are the terms wrt duration? was it 20% royalties while you continued as a developer, 20% for the lifetime of the product? Do you have any say in e.g. pricing/offers, which would affect sales/sale price, and hence your % * you say they "included payment for development work" but that "however then I have needed to pay these pay with reductions in royalties" - if it comes out of your royalties, how does it include payment for dev work? i.e. how does this differ from "not included payment for development work"; Do you mean he gave you an upfront loan to cover living/dev cost, but there is no additional payment for these on top of royalties? * is your salary 2x avarage salary (in your home), or 2x salary for that job type or industry?