Every cheat activated
I noticed that you keep almost everything you had when you go into hero mode so here is my hint. When you beat the game get as many precursor orbs as you can. Then buy the invulnerability cheat, infinite dark jak, infinite light jak, and infinite ammo. Then buy any other cheat you wany but remember to keep at least 5 precursor orbs for hero mode, then when you activate it all your cheats will still be there and you will find all you former precursor orbs are there again to be found. Find them and buy the rest of the cheats for all of them.
More tricks, tips and cheats for this game are right here - Jak 3 cheats
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