Upon updating your game while connected online, you will be able to download the update that adds the Critical Mode update when starting a new game.
Just like in past Kingdom Hearts games, the Critical Mode is a much higher difficulty that packs real challenge. Modifiers such as maximum HP and MP are halved, and the way Sora performs new abilities will be much harder under this mode.
In addition, the new update also adds the ability to carry over their Keyblades to a new game- making the experience somewhat more bearable.
Here’s a more detailed patch notes, via Square Enix:
In this update, players can embark on–or relive–the adventure of a lifetime with Sora and friends in the all-new Critical Mode, an additional high-difficulty mode that will challenge players in their fight against the darkness.
Critical Mode will challenge even the most skilled Keyblade wielder to be more tactical as they battle formidable foes. In this new mode:
– Maximum HP and MP are halved.
– The frequency of situation commands and magic is lowered.
– Sora can perform new abilities exclusive to this harder difficulty mode.
Additionally, this update adds the feature for players to carry over their Keyblades to a new game. Keyblades that are carried over will return to their default strength, but through this optional feature, players can utilize Keyblades otherwise not obtained until later in the game from the beginning.
Kingdom Hearts 3 is available now for PlayStation 4 and Xbox One.