“c. You may use the Product in digital documents and software applications provided that: i. The Product is protected from extraction by the end user so that they may not access the Product on its own outside of your application. ii. Your digital document or application is not designed to serve the same function as the Product, i.e. the document must not allow end-users to use glyphs from the Product for use in their own designs.”
Either change your license or check your lawyer. This very clearly says just leaving the otf file out in the game files as extractable.