After completing the main story, you unlock New Game+, which allows you to replay the game with all your unlocked gadgets and upgrades, but with tougher enemies and no counter icons. For the ultimate challenge, aim for 240% completion. This requires completing the main story, New Game+, all Most Wanted missions, and collecting all 243 Riddler Trophies. Achieving this unlocks the true 'Knightfall Protocol' ending, providing a more complete narrative conclusion. It's a true test of your mastery of the game.
