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Not to be confused with Chao. For other uses, see Chaos (disambiguation).

You know nothing, fool! It's Chaos, the god of destruction!

Dr. Eggman, Sonic Adventure

Chaos (カオス Kaosu?), also referred to as the god of destruction (破壊神 Hakai-shin?), is a character that appears in the Sonic the Hedgehog series. It is an immortal mutant Chao and a godlike figure[5] who serves as the guardian god of the Chao and their friends.[6][7] Its body is composed entirely of concentrated energy,[5] and it has the ability to change form and evolve with each Chaos Emerald that it absorbs.

The first known guardian of the Chaos Emeralds,[5] Chaos watched over a Chao colony in ancient times. However, 3,000 years ago, an attack from the Knuckles Clan led to it being consumed by a fury that threatened to destroy the world. However, it was sealed in the Master Emerald before it could succeed. In the present day, it was released by Dr. Eggman for a plot to conquer the world. Despite initial cooperation however, Chaos eventually revolted and tried to destroy the world. Fortunately, it was soon calmed by Sonic and departed for places unknown in peace. Since then, Chaos has only re-emerged in times of great crisis.[7]

Concept and creation

For Sonic Adventure, Sonic Team wanted to introduce a new enemy that was bigger and separate from the already-established main antagonist, Dr. Eggman, an enemy which could match up to the impact that Sonic Adventure was going to make by being a bigger Sonic game than any of those before it, namely by taking advantage of the technological jump from the Sega Mega Drive to the Dreamcast. Takashi Iizuka in particular wanted to design an enemy that had not been possible until now due to the limitations in technology. With Iizuka wanting something transparent and liquid since the technology now allowed it, the team came up with Chaos. Chaos was designed to impress the players and appear both bigger than Sonic and much more powerful than any enemy before it. It was for these reasons that the team wanted Chaos from the beginning and introduced it as the first boss of the game in order to emphasize the greater scale of Sonic Adventure in comparison to previous games.[8]

When the team first designed Chaos, they presented the drawing to Yuji Naka, who was so impressed with the idea that he approved of it on the spot.[8]


Chaos 0, from Sonic Art Assets DVD.

Chaos is a lifeform with a body made of water-like energy. There are numerous forms it can take, although its most recognizable one is its Chaos 0 state. In this state, Chaos possesses a humanoid form with disproportionally long arms and legs compared to its torso. It has thick forearms with three large fingers on each hand, a short stump for a tail, and long feet with two large toes each. It also has two fin-like protrusions on the back of its head, sharp flaps on each side of its head, and a tall bulge on top of its head. It also possesses no facial features, except for two pupil-less lime green eyes. Lastly, it has a round pink brain inside its transparent head, with a brain stem on the bottom.


Said to have a warm heart,[6] Chaos is primarily a very loving and gentle creature who cares dearly for the Chao it protects.[9] Mainly watching over the Chao as an inert pool of water, it only becomes active in times of danger, and only attacks when the Chao needs protection. However, it is noted to have a bad temper;[10] after seeing its sacred precincts being invaded by Pachacamac and his men, Chaos became filled with anger and sadness.[11]

Following the attack on its precinct three thousand years ago, Chaos became corrupted by its own negative emotions, causing to forsake its peaceful and passive ways and become a rage-filled monster driven only by its own immeasurable anger. Its fury proved to be so great that it wanted nothing more than to destroy the world out of spite, even after getting revenge on those responsible for angering it in the first place. In its corrupted state, Chaos remained eternally determined and vengeful, as its desire to bring the world to ruin persisted even after three millennia. However, after Super Sonic neutralized it, Chaos returned to its previous peaceful and gentle demeanor from then forth.

Powers and abilities

Chaos is an incredibly strong creature whose power is so great that it is revered as a deity. Even at its weakest, Chaos is said to possess immeasurable powers.[6]

Chaos possesses the ability to absorb Chaos Emeralds and its form, power and skills change and increase with every Chaos Emerald that it absorbs.[1] Chaos also has hydrokinetic abilities that allows it to control water to a greater or lesser degree, depending on its form. Chaos can also, through its powers, provide clean water in a chosen location,[1] or create massive floods if it has the right amount of Chaos Emeralds. Also, being made of liquid energy, Chaos is nearly indestructible and can mimic the properties of water. It has complete control over its physical structure, allowing it limited shapeshifting, such as elongating its forms, change its shape into fluid liquid, and if dissipated, it can reconstitute itself again. Also, in addition to its indestructability, it is an immortal being.[5]


Chaos 0

See also: Chaos 0 (boss)

Chaos 0, from Sonic Adventure.

Chaos 0 is Chaos' most basic form, assumed when it is possession of no Chaos Emeralds. In this form, Chaos commands limited hydrokinetic shapeshifting, allowing it to stretch its limbs, morph its body parts, and liquefy itself into a puddle of water. It is also bulletproof due to its watery composition and possesses earthquake-inducing super strength. It can also harness the power of spirits and elementals to perform great physical feats (like several tens meters tall leaps), execute strong attacks, and even heal itself. It also has hydrokinetic powers that lets it emit mysterious ripples and even freeze the air around its foes. In addition, it can climb, glide and breathe underwater.

In addition to its wide skillset, Chaos 0 also has very strong combat skills,[1] enough to take on Knuckles the Echidna, who is master of martial arts.[12]

Chaos 1

Chaos 1, from Sonic Adventure.

Chaos 1 is the form Chaos takes after absorbing the negative chaos energy of one Chaos Emerald. In this form, Chaos increases in size and mass, and it gains a line of bones that travel down its right arm into its hand.

Most of Chaos 1's abilities are unknown. although it retains its power of hydrokinetic shapeshifting, allowing it to liquefy itself into a puddle of water.

Chaos 2

Main article: Chaos 2

Chaos 2, from Sonic Adventure.

Chaos 2 is the form Chaos takes after absorbing the negative chaos energy of two Chaos Emeralds. In this form, Chaos becomes larger and more muscular with a hunched posture, bones in both its large arms, and vertical hammerhead fins.

As Chaos 2, Chaos is much stronger, and its hydrokinetic shapeshifting has evolved significantly, allowing it to turn into a large ball, liquefy over a wide area and split into hundreds of balls. It can also stretch its limbs over a wide range and generate a force-field around itself.

Chaos 4

Main article: Chaos 4

Chaos 4, from Sonic Adventure.

Chaos 4 is the form Chaos takes after absorbing the negative chaos energy of four Chaos Emeralds. In this form, Chaos looks like an aquatic creature, similar to a shark, with arm-like fins, a dorsal fin, and a blunt horn. It also has bones in its tail section and arms.

As Chaos 4, Chaos' hydrokinetic shapeshifting has evolved further, allowing it more offensive usage of its shapeshifting. It also has new abilities to match its new form, including more control over water and energy wave emission. It is also a quick and nimble swimmer, and is able to levitate in the air.

Chaos 6

Main article: Chaos 6

Chaos 6, from Sonic Adventure.

Chaos 6 is the form Chaos takes after absorbing the negative chaos energy of six Chaos Emeralds, making this its pre-ultimate form. In this form, Chaos resembles a scorpion/spider/frog-like creature with six legs, a long tail, multiple eyes, and a toothed mouth. It also has an extended skeleton inside its body.

As Chaos 6, Chaos commands immense power. In this form, its hydrokinetic shapeshifting has reached the point where it can assume more complex forms that feature a variety of tentacles. It has also gained a vacuum breath and can charge its attacks with energy.

Perfect Chaos

Main article: Perfect Chaos

Perfect Chaos, from the console/PC version of Sonic Generations.

Perfect Chaos is the form Chaos takes after absorbing the negative chaos energy of all seven Chaos Emeralds. In this form, Chaos becomes a giant serpentine dragon-like beast with a mouth extending far beyond its eyes (which are now reptilian) and a scale-like hide instead of a skeleton. The base of its snake-like body is merged with the water around it. It also has large tentacles extending from its base.

As Perfect Chaos, Chaos is a higher being that accordingly commands ultimate power. It is able to merge with water and has immense hydrokinetic abilities that lets it create large-scale water sprouts, command water tornadoes, and control entire floods which are destructive enough to destroy all of Station Square. It also has incredible super strength and can shoot energy blasts from its body and beams from its mouth.


Despite its numerous forms and godlike power, Chaos has one consistent weakness: its brain. This is a weak spot that, when hit, will cause Chaos's form to weaken and destabilize. It is also not well protected in most of its forms.






  1. 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 Sonic Channel (Japanese). Characters: Chaos. Sega. Archived from the original on 26 May 2019. Retrieved on 3 July 2015.
  2. "カオスエメラルド伝説" (in Japanese). ソニックアドベンチャー ナビゲーションガイド. SoftBank. 16 March 1999. pp. 156-158. ISBN 978-4797308624.
  3. Sonic Adventure online. Sonic tactical info: Chaos 0 Attack Patterns. Archived from the original on 25 May 2016.
  4. Sonic Adventure online. Sonic tactical info: Chaos 0 Attack Patterns. Archived from the original on 25 May 2016.
  5. 5.0 5.1 5.2 5.3 Sonic City. Archived from the original on 29 January 2008. Retrieved on 4 July 2015.
  6. 6.0 6.1 6.2 Sonic Adventure 2: Battle (Nintendo GameCube) United States instruction booklet, pg. 23.
  7. 7.0 7.1 Sonic Team (5 January 2004). Sonic Battle. Game Boy Advance. Sega. Area/Level: Holy Summit (Emerl's Episode). "Knuckles: When that battleship appeared, the "Estuary" instantly froze over, and "Chaos" appeared. He's just sitting there, guarding the "Death Egg." Chaos is the guardian god of the Chao. He only shows himself in times of great crisis. Looks like we're in deep trouble this time!"
  8. 8.0 8.1 Sonic Adventure DX - Director's Commentary (2004). YouTube. The Sonic Stadium (30 August 2015). Retrieved on 6 February 2022. "Takashi Iizuka: As all Sonic fans know, the primary villain in every previous Sonic game as always been the notorious Dr. Eggman. But we knew that in order to make a bigger game, something with much more impact, I wanted to take advantage of the technological jump we made going from Genesis to Dreamcast in a Sonic game. I wanted to create an enemy that hadn't been possible until now. I wanted something bigger. Something... transparent and liquid because the technology now allowed for it. I wanted something that would wow the users. That's when we came up with the idea for Chaos. He was larger than Sonic. And he looked much more powerful than any enemy any Sonic game had ever seen. And that's why we wanted him from the very beginning and included him in the opening sequence. We wanted to make a statement, we wanted to show the users from the very beginning of Sonic Adventure that this game was bigger and better. When we first designed Chaos, we presented the drawing to Naka-san, and he liked the idea so much that he approved of it on the spot."
  9. Sonic Team (9 September 1999). Sonic Adventure. Dreamcast. Sega. Area/Level: Mystic Ruins (Gamma's story). "Tikal: Did you notice the presence guarding these children? He's a very loving and gentle creature."
  10. Sonic Forces: Stress Test, "Stress Test"
  11. Sonic Team (9 September 1999). Sonic Adventure. Dreamcast. Sega. Area/Level: Super Sonic's story. "Tikal: My heart has always been in the Master Emerald, along with Chaos'. Now he's filled with anger and sadness. And If it goes on, he'll eventually destroy the world, like he did before!"
  12. Sonic Team (9 September 1999). Sonic Adventure. Dreamcast. Sega. Area/Level: Super Sonic's story.