System Sector

System Sectors (システムエリア) are locations unique to Kingdom Hearts Re:coded, replacing the Debug Areas that appeared in Kingdom Hearts coded. They can be accessed through Backdoors (バックドア), and are found in almost every world. A System Sector can have several different floors. Once one floor is cleared, a link appears, which allows Data-Sora to move up a floor. Eventually, a terminal will open, allowing Data-Sora to leave the System Sector altogether.

Overview
Inside each Sector reside bugs. If a section of the Sector is colored red, bugged enemies must be eliminated. Bugged Heartless are colored completely black with a colored aura and computer monitors floating around them. The color of these auras and monitors indicates some stat boosts that are applied to the enemy:


 * Blue aura: normal
 * Yellow aura: increased speed
 * Red aura: immunity to stagger
 * Green aura: giant size, and doubled max HP

Once Data-Sora has defeated every bugged Heartless, the room will become blue. The link to move up a floor, or terminal to leave the System Sector, only appears after every room is blue, known as a 'Sector Debug'.

Defeating Heartless and destroying Prize Blox will earn Data-Sora System Points, or SP. Once Data-Sora leaves the Sector, he will be prompted to redeem his SP for rewards. The first few rewards will be highlighted in yellow, meaning that they are "system rewards", and that they can only be redeemed once. Below these are other prizes, which can be obtained repeatedly. Each of these repeatable rewards will double in cost every time they are redeemed. Once the player doesn't have enough SP for an item, they must trade the remainder in for EXP or munny, with the conversion rate varying depending on the sector. The amount of EXP or munny that can be redeemed is capped at 99999.

After completing Traverse Town, System Challenges become available. Once Data-Sora enters a System Sector, he will be rewarded 1000 SP. Before he can enter each floor, he will be prompted to wager 10%, 30%, or 50% of the SP he had when entering the floor. If he can complete the challenge, he will be rewarded the amount wagered, with a multiplier added. If he loses the challenge, he will lose the amount of SP wagered. If the player runs out of HP during a challenge, they lose a large majority of their SP. Each floor has a separate challenge. Later in the game, floors may be randomly infected by a virus (ウイルス), forcing Data-Sora to wager all of his SP on its challenge, and causing each room to be not only bugged, but have stronger Heartless.

Avatar Sector
Main Article: Avatar Menu

A special System Sector called the Avatar Sector is available through the Avatar Menu on the title screen. This sector has several differences compared to normal System Sectors:
 * Data-Sora starts with 0 SP instead of 1000 SP.
 * While each floor does have a System Challenge, only floors that are multiples of 10 have challenges that allow betting and earning SP. All other floors' challenges award avatar parts instead.
 * It is not possible for a floor to randomly be infected by a virus in the middle of playing the Avatar Sector. The only way to have a virus in the Avatar Sector is to be infected by another avatar, and even then the virus only affects the first floor played.
 * It is possible to start from any floor that has been previously cleared, whereas normal System Sectors only allow Data-Sora to start from the first floor.
 * The amount of floors is not fixed - instead, the player builds floors one at a time until reaching the maximum of 100. Floors can also be deleted at will.
 * The level of heartless enemies will match the floor's number, whereas in normal System Sectors the enemies' level is consistent across floors.

Backdoors
Each System Sector requires Data-Sora to find a Backdoor, which is invisible, so that he can access the System Sector. While finding a Backdoor, a beeping is heard and a blue sensor appears on the bottom screen, mini-map, around the icon representing Data-Sora. Finding a Backdoor is similar to playing a game of "" as the player must search for the invisible door with the aid of the beeping, which beeps faster when Data-Sora goes closer to the Backdoor, and the sensor, which flashes faster and becomes red when Data-Sora gets closer. When Data-Sora is very close to the Backdoor, the invisible door is locked on and the player must examine it to open the door, making it visible.

Leveling up Scan allows Data-Sora to detect more Backdoors and System Sectors during Questploration. System Sectors that are encountered through the story do not have a Scan level requirement.

Notes and references
Systemkerne