Inject the 3 files into your own game save using Horizon.
Load up the first level and use Sully, upgrade him with 1 star and unlock Ultimate Cosmic Power for 90g.
Make sure you have got all other achievements first as this unlocks about half the achievements
Resigning a game save doesn’t work for this game, you must inject the 3 files into your own game save.
will not unlock Gold for the world