Note: This game is also titled Persona 3.
Successfully complete the game and save when prompted. Load the cleared saved game to start with your previous Demon Compendium, money, items, level, money, and elapsed time. You will also have maximum Social Links access to the Monad Block. There is also a new optional Boss battle.
Reach Tartarus at Floor 254 to unlock Monad Block. Monad Block has monsters that are over level 90.
To get an enemy to turn its back to you, enter the menu, then exit out. The enemy will begin moving in a new direction. Repeat this until it has turned away.
At anytime while in Tartarus, warp back to the first floor to completely restore your party's HP and SP. Note: If a party member is "tired", they will go back to the dorm and you will not be able to use them until the following night.