A Limit Break (リミットブレイク, Rimitto Bureiku?) is a powerful ability introduced in Kingdom Hearts 358/2 Days. During a Limit Break, the user unleashes a tremendous amount of power as an attack that they wouldn't normally be able to perform. The attack is usually based on the user's element or abilities in previous games, such as a combo finisher or Limit. Unlike a Limit from Kingdom Hearts II, the character can take damage if attacked while performing a Limit Break, although the damage taken is less. It also heals the character from any negative status effect and prevents them from getting any status effects.
In order to activate a Limit Break, the user must drop into a low amount of their HP, also known as the Alarm Zone. This area is marked as being yellow, as opposed to the rest of the green bar. After having dropped into the player's Alarm Zone, a small sound will sound. This means that the player can hold down the "A" button for a few seconds to begin their Limit Break. Once the powerful attack has been triggered, a marker will begin to move down the HP bar, until it reaches the other end. At that point, the Limit Break ends, and the Alarm Zone is set closer to the end of the HP bar. To use the Limit Break again, the player must survive another attack to re-enter the Alarm Zone. The item Limit Recharge increases the Alarm Zone, and the ability Limit Boost increases where the Alarm Zone is at the beginning of a mission. The Extreme ring has the One HP ability, which caps the maximum HP at 1, enabling the use of Limit Breaks at all times, even from the start of a mission.
On Day 225 of the Story Mode, Roxas will receive the Final Limit (リミットカット, Rimitto Katto?, lit. "Limit Cut") panel from Saïx, which allows to user to execute their Final Limit. During a Final Limit, the user's Limit Break is prolonged, doubling the length of the attack. This is because the user will execute a special extra ability during a second part of their Limit Break. This extra attack will become executable when the marker that runs across the HP bar touches the left end of the HP bar. Then, the marker will run backwards to the Alarm Zone; during this time, the special series of an extra attack will begin until the end of the Limit Break. Because of this, the Final Limit's extra ability can only be used during the second half of the Limit Break. It also will always begin in the exact middle of a Limit Break, provided the user does not gain or lose any health in the process.
The Limit Pass, which is available at the Moogle Shop after meeting certain requirements, allows the player to configure their Limit Breaks in Mission Mode under the "Mission Config" menu. Limit Breaks can either be disabled, used normally, or used repeatedly without decreasing the threshold.
List of Limit Breaks