 To combat this, HES introduced their own seal that mimicked Nintendo’s seal, possibly in the hope of confusing buyers.In order to circumvent other methods that Nintendo created to stop unlicensed developers (10NES), HES developed the 'Piggy Back' or 'Dongle' games, where one could insert an official NES cart into the HES game and it operated the country code of the official title instead of HES'.This was so successful that HES also used the same technology to build a device to entirely bypass the 10NES security protocol which was released as the "HES Unidaptor".