However, there's a precedent for Nintendo going after games made in a similar fashion to Ship of Harkinian. The creators believe this may make it legal because the code is created from scratch, and the copyrighted parts, the assets, are taken from the ROM players are supposed to have 'legally obtained.' According to an interview with VGC, Ship of Harkinian works by extracting the game's native assets from the N64 ROM (which you will need to own to run the PC port) and then running a native PC version. Nintendo is notoriously copyright-lawsuit-happy, and the Harbour Masters have tried to make the port as technically 'legal' as possible.