: While the original three endings are included, completing the Womb of Grief unlocks three new alternate endings —one for each alignment—bringing the total to six.

: A mysterious new character, Alex , is introduced alongside a massive optional dungeon called the Womb of Grief . This dungeon adds new bosses, demons, and side quests (EX Missions).

: The UI has been redesigned, environments remade, and character portraits redone with more expressions. The game also features full Japanese voice acting .

: Your choices influence your alignment (Law, Chaos, or Neutral). If you strike an enemy's weakness, allies of the same alignment will perform a powerful follow-up Co-op attack.

: A new mechanic where the protagonist can use powerful support abilities (like "Assailment" to boost attack) that do not take up a standard turn but have cooldowns. New Content in Redux

: Players can negotiate with and recruit over 350 demons . The fusion system now allows for manual skill inheritance when using a Demon Source, removing the randomness of the original.