Secrets, made available as the player progresses and collects elusive Precursor orbs, can be purchased and toggled, allowing the player to access "cheats" such as upgraded weapons damage, world mirroring, or invincibility. After the game has been completed, the Hero Mode option is made accessible, which, when purchased, allows the player to replay the game at a higher difficulty level, but with all previously unlocked cheats and extras still available. As the Precursor Orb count is not reset, and the orbs are regenerated at their original locations, the player is able to regather orbs that he or she had already collected the previous time they played through the game. Collecting all 600 Precursor Orbs has some cosmetic effects on Jak's appearance, but has no effects other than this. In Hero Mode, Jak also keeps all twelve of his weapons but loses his light flight along with two of his dark powers until they are collected in their respective parts of the game.