Yes. And your commercial license can still offer the source code. Unreal engine is an example of such a licence. Anyone can access the source code for free (ju

Yes. And your commercial license can still offer the source code. Unreal engine is an example of such a licence. Anyone can access the source code for free (just need to jump though a hoop of signing up of an account and agreeing to the terms and conditions). Anyone can release a game without paying unreal a cent. But it is not open source. The two major restrictions are: You can't share the source code to people who haven't agreed to the terms and conditions; And if you earn more that $1 million in revenue, you must pay epic games 5% of all additional revenue. Epic have even gone to the additional step of removing their right to revoke the license from the license agreement. They can take you to court if you don't pay, but they can't simply revoke the license.