System Sectors

System Sectors replace the Debug Areas that appeared in Kingdom Hearts Coded. They can be accessed through Backdoors, and are found in virtually every world. (Castle Oblivion has no System Sectors) A System Sector can (And most times will) have several different floors. Once one floor is cleared, a transport appears in the form of a column of light, allowing Data-Sora to move up a floor. Once he has passed all of the floors, a terminal will open allowing him to return to the world.
Inside each Sector reside bugs. If a section of the Sector is colored red, there are certain enemies with colored grids around them, (Shown right) that must be destroyed before you can advance. The grid color is different with each floor. Sometimes it is yellow, red, green, etc. Once Data-Sora has defeated bugged Heartless, the room will become blue. Defeating Heartless and destroying Bug Blox will earn Data-Sora SP. Once Data-Sora leaves the Sector, he will be prompted to redeem his SP for rewards You have no choice in the matter. You have to either redeem on prizes presented, Experience, or Munny in order to leave the System Sector. 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 at all times. Once the player doesn't have enough SP for an item, they must trade the remaining SP in for EXP or munny.
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 sum of their SP. Each floor has a separate challenge.
Later in the game, floors with challenges may be randomly infected by viruses, forcing Data-Sora to wager all of his SP on its challenge, and causing each room to be not only bugged, but with stronger Heartless. These get tricky for players who are triyng to get the rewards out of that system.
One of the most difficult challenges by far is the PLAY AT NIGHT challenge. This one is the last in the Olympus Coliseum. You have to play literally at night in accadance with what the DS's time is set to. If you are going to partake in this System Sector, save first. Then restart the DS, and set the time to evening/night time. It is the only way to get the challenge without losing.
Below is a complete System Sector listing, as well as the challenges and rewards gained from each location.

Tree House
Challenges			Sector Rewards
Floor	SP Rate	Objective	Sector Reward	SP Cost
1 2 3	x4.0 x6.0 x7.0	Take damage no more than 9 times Defeat 45 Heartless Take damage no more than 7 times	Debug Device: R Armor Bangle Life Preserver HP +2 Strength +1 Defense +1 Fira	8000 SP 10000 SP 8000 SP 1000 SP 1000 SP 1000 SP 1000 SP

Secret Place
Challenges			Sector Rewards
Floor	SP Rate	Objective	Sector Reward	SP Cost
1 2 3 4	x4.5 x5.0 x6.0 x6.0	Exit the floor in 180 seconds or less Use a Finish command in under 60 seconds Exit the floor in 100 seconds or less Use a Finisher 3 times	Meteor Rain Jump Rope HP +2 Strength +1 Magic +1 Slow	56000 SP 18000 SP 3000 SP 3000 SP 3000 SP 1000 SP

3rd District
Challenges			Sector Rewards
Floor	SP Rate	Objective	Sector Reward	SP Cost
1 2 3	x4.0 x6.5 x8.0	Exit the floor in 120 seconds or less Use a Finish command in under 80 seconds Exit the floor in 80 seconds or less	Zip Watch Wrench Debug Device: R HP +2 Strength +1 Magic +1 Air Spiral	7000 SP 7000 SP 4000 SP 1000 SP 1000 SP 1000 SP 1000 SP

Alleyway
Challenges			Sector Rewards
Floor	SP Rate	Objective	Sector Reward	SP Cost
1 2 3 4 5	x5.0 x5.5 x6.5 x6.5 x8.0	Ignite 20 Heartless Jump less than 20 times Exit the floor in 200 seconds or less Do not use healing commands Do not miss with your attacks more than 5 times	Lionheart Goggles Fire +1 Blizzard +1 Thunder +1 Aeroga Magnega	348000 SP 129000 SP 29000 SP 29000 SP 29000 SP 9000 SP 9000 SP

Lotus Forest
Challenges			Sector Rewards
Floor	SP Rate	Objective	Sector Reward	SP Cost
1 2 3	x4.0 x5.5 x7.5	Miss with attacks less than 10 times Defeat 3 Heartless while at MAX Overclock Use a Finisher in less than 50 seconds	Half-Moon Armlet Glass Vial Thunder +1 Aero +1 Cure +1 Stop	13900 SP 8300 SP 2700 SP 2700 SP 2700 SP 2000 SP

Vestibule
Challenges			Sector Rewards
Floor	SP Rate	Objective	Sector Reward	SP Cost
1 2 3 4	x4.0 x5.5 x6.5 x7.0	Counter 5 enemy attacks Exit the floor in less than 45 seconds Earn 1200 SP Play at night	D-Thundara Barbell Strike Armlet HP +2 Strength +1 Magnet	74000 SP 37000 SP 7000 SP 7000 SP 7000 SP 1000 SP

Palace gates
Challenges			Sector Rewards
Floor	SP Rate	Objective	Sector Reward	SP Cost
1 2 3 4	x5.0 x6.5 x7.5 x8.5	Take damage less than 10 times Take damage less than 10 times Take damage less than 8 times Take damage less than 5 times	Counter Ring Silver Ring Fire +3 Blizzard +3 Cure +1 Blizzaga	62000 SP 47000 SP 31000 SP 31000 SP 25000 SP 6000 SP

Upper Gauntlet
Challenges			Sector Rewards
Floor	SP Rate	Objective	Sector Reward	SP Cost
1 2 3 4 5 6 7	x3.5 x4.0 x4.0 x4.5 x4.5 x5.0 x6.0	Counter 20 enemy attacks Exit the floor in under 45 seconds Use Magic Commands no more than 8 times Defeat 5 Heartless in a single blow Collect 10 items Land 10 critical hits Take damage less than 5 times	Zone of Ruin Ruby Hairpin Defense +1 Aero +1 Curaga Triple Blizzaga	620000 SP 310000 SP 103000 SP 103000 SP 20000 SP 20000 SP

Lower Gauntlet
Challenges			Sector Rewards
Floor	SP Rate	Objective	Sector Reward	SP Cost
1	x5.0	Defeat the Golden Tricholoma	Energy Earring Debug Device: R Fire +2 Blizzard +2 Fire Resistance +2 Blizzard Resistance +1 Aero	600 SP 500 SP 400 SP 400 SP 400 SP 300 SP 300 SP

Upper Entrance Hall
Challenges			Sector Rewards
Floor	SP Rate	Objective	Sector Reward	SP Cost
1 2 3 4 5 6 7 8 9 10 11 12 13	x1.5 x1.5 x1.5 x2.5 x2.0 x3.5 x2.0 x3.5 x3.0 x2.0 x3.0 x3.0 x4.5	Use a Megalixir Exit the floor in under 100 seconds Air-toss 15 Heartless Exit the floor in under 60 seconds Use ATTACK less than 10 times Miss with attacks less than eight times Do not use healing commands Take damage less than 5 times Take damage less than 8 times Defeat 10 Heartless while at MAX Overclock Exit in under 120 seconds Defeat the Eliminator Use a Finisher in less than 60 seconds	Ultima Weapon Debug Device: Y HP +4 Strength +2 Magic +2 Defense +2 Lucky Strike Fire +2 Blizzard +2 Thunder +2 Aero +2 Cure +2 Fire Resistance +2 Blizzard Resistance +2 Thunder Resistance +2 Aero Resistance +2 Icicle Mine Flame Fall	1500000 SP 102000 SP 51000 SP 51000 SP 51000 SP 51000 SP 51000 SP 51000 SP 51000 SP 51000 SP 51000 SP 51000 SP 51000 SP 51000 SP 51000 SP 51000 SP 40000 SP 40000 SP