Game save at the end of game, go to the final fight.
Mana : All unlocked
Health : All unlocked
Spells : All unlocked
Minion : All unlocked + all upgrade
Weapons : All unlocked and all buy
Sidequest : All unlocked and all done...

Game save at the end, go fight final boss, have (to my knowledge) all health and mana upgrades, max. minions and all spells, all sidequest (again, as far as I know) are done (none come up after visiting the NPC's that give them to you) Full and complet...