Chaos ( Final Fantasy VII ) Chaos appears in " Final Fantasy VII " and its sequel " Dirge of Cerberus - Final Fantasy VII - " . Chaos has a minor role in " Final Fantasy VII " as a Limit Break for Vincent , but has a larger role in " Dirge of Cerberus - Final Fantasy VII - " , having a backstory , and being the cause of the major conflicts in the game . Chaos is a recurring demonic creature in the series , but Vincent as Chaos is the only incarnation of it in the " Final Fantasy " series that is portrayed as clearly on the heroes ' side ; it is not necessarily benevolent , but only because Vincent himself is . Profile . Chaos ' s appearance has varied , but maintains the theme of a devil and infernal being . In " Final Fantasy VII " , Chaos is a dark gray - skinned devil with a muscular build , a bald head with elongated ears , and typical features of western demons , such as horns , hooves and bat wings . In " Dirge of Cerberus - Final Fantasy VII - " , Chaos appears as if its powers have been violently spliced with Vincent ' s being , resulting in a ragged , worn , and wicked - looking demonic Vincent . Many features of his clothes have merged with Chaos ' features : his cape has become its wings ( which he can fold up to resemble a hang glider - like cape ) , his headband has merged with his hair and is warped into a large crest of horn - like protrusions , and the remainder of his clothes have melded with his skin forming what appears to be an exoskeleton with muscular definitions and various protrusions of organic yet corrupted features . His golden gauntlet has merged with his arm . The sabatons of his boots have become " hooves " . His left pectoral is carved out and features the Protomateria where his heart should be . He has light gray skin , gold eyes with light gray sclerae ( that appear as red when his irises are glowing ) , and small black - slitted pupils , fang - like teeth , four thin " cuts " on his face ( one under each eye and at each end of his mouth ) , and golden diamond - shaped " kneepads " . Story . Stated in the Omega Report s , Chaos was described in an ancient Cetra tablet . A team of scientists that included Grimoire Valentine and Lucrecia Crescent found a small pool of tainted Lifestream within the Crystal Cave and hypothesized Chaos would arrive there at the destined time , and later excavated the Protomateria from its depths . With samples of the Mako and the newly discovered Protomateria brought back for experimentation , Grimoire died in an experiment associated with the discovery . Shinra Electric Power Company used the tainted Mako to create stronger SOLDIER s within Deepground resulting in the birth of Nero the Sable . The scientific investigation of Chaos and Omega came to a stop when other scientists dismissed and criticized Lucrecia ' s report . When Vincent meets Rosso the Crimson the two fight with Vincent losing as he is unaware of the strength of his opponent . When Vincent emerges a few seconds after being defeated , he is Chaos , and knocks Rosso away . Vincent has control over himself while in this form as the Protomateria is within his body . Vincent later awakens to find himself in a regenerative chamber in the World Regenesis Organization ( WRO ) headquarters . Shalua Rui , who found him and brought him to the WRO to recover , releases him , and tells him about Lucrecia ' s research on Chaos , but Deepground attacks forcing him to leave his questions until later and fight . When Vincent is in the Shinra Manor in Nibelheim , he finds a piece of Materia that contains a recording from Lucrecia . Lucrecia explains what Chaos and Omega mean to the planet and tells Vincent Omega will be the end of the world , though she does not mention the part Chaos plays in this . Vincent comes across Rosso , and after a talk she flees . He chases after her to the mansion entrance where he fights a Black Widow robot . Afterward Rosso catches Vincent off - guard and removes a piece of Materia from his chest . Vincent transforms into Chaos , but instantly reverts . Rosso comments Vincent cannot control Chaos without the Materia she just extracted , but before she can kill him Yuffie arrives and rescues him . Chaos becomes increasingly unstable within Vincent . Aboard the " Shera " he briefly becomes Chaos , tearing gouges into the wall , but is brought out by a vision of Lucrecia approaching him , snapping him out of it . He gets another bout of Chaos outside the Shinra Headquarters in the ruins of Midgar where Shelke explains that after the Protomateria was taken from him , his mental defense against Chaos was weakened and he is losing control . She explains that Chaos , while a part of Vincent , acts independently , and explains that Chaos shall be born before the planet dies to gather all life for Omega . Chaos is a semi - Weapon ( a creature of magnificent power created by the planet ) that acts according to the will of another Weapon , Omega , that the planet calls forth in a time of threat . Chaos is a being born of negative memories and the sins within a naturally occurring stagnated and tainted form of Lifestream . Should the stagnant Lifestream increase in unusually high quantities , its ultimate purpose is to act as an executioner of all life and harbinger of death . This is triggered by the planet ' s reaction to this imbalance upon periods of great catastrophe , decline , and mass planetary - scale destruction , to allow the rest of the planet ' s Lifestream to be gathered to a new planet to continue the cycle of life . Chaos appears after Azul knocks Vincent unconscious after their fight . Chaos goes wild , impales Azul with his gun and knocks him off the elevator they were on . Vincent flashes back to the time after he was shot by Hojo and Lucrecia was trying to revive him . Hojo comments on Chaos and Omega , but no information is given on them . Chaos is mentioned in another flashback where Lucrecia and Grimoire Valentine , Vincent ' s father and a fellow scientist interested in Chaos and Omega , are in the Crystal Cave which , according to Grimoire , is where Chaos will awaken . Hojo , or rather , a digital version of him inside Weiss , explains to Vincent how Chaos exists within him . Due to Hojo ' s experiments of Vincent many years ago , Vincent ' s body became durable enough for Chaos to exist inside him . He says Chaos is born of a tainted Lifestream . Vincent tries to use Chaos to fight Weiss but fails . Vincent hallucinates Lucrecia standing in front of him ; she tells him to try and control Chaos , not let Chaos control him . Via the Protomateria within Weiss Vincent uses Chaos ' power while retaining his human form and defeats Weiss . Chaos takes full control over Vincent ' s body when Omega is summoned , according to Shelke , to counterbalance Omega ' s appearance . Shelke uses a Synaptic Net Dive to retrieve the Protomateria and return it to Vincent so he can control Chaos . It is revealed that after Vincent was shot by Hojo and experimented on , he was still dying . Lucrecia infused tainted Lifestream into him , as she believed her thesis on Chaos could save him . While this stopped Vincent ' s body from decaying he became permanently Chaos . Lucrecia discovered the Protomateria and used it so Vincent could control Chaos , but he resumed decaying , as when Lucrecia tried to use it , her computer screen flashed red . It is unknown what happened to Vincent after this , or how he stopped decaying , but due to the events of " Final Fantasy VII " and its flashbacks , it can be assumed Vincent woke up and realized what he had become , and willingly went into a deep slumber . Vincent as Chaos combats Omega and Weiss . After the battle Omega ascends so Vincent uses Chaos to destroy it . Back in the Crystal Cave where Lucrecia lies crystallized , Vincent tells her Chaos and Omega have returned to the planet . Gameplay . " Final Fantasy VII " . Vincent is an optional character , and thus the player can bypass seeing Chaos at all . Chaos is Vincent ' s ultimate Limit Break obtained after visiting the Crystal Cave with Vincent in the party , viewing the events there , and returning after fighting ten battles . Examining the altar afterward receives the manual , along with the Death Penalty weapon , which is Vincent ' s ultimate weapon . To use the manual , Vincent must have obtained his other Limit Breaks . Like all of Vincent ' s Limit Breaks , the player has no control over Chaos once Vincent transforms into him , his stats change and he uses unique attacks . Vincent ' s Defense and Magic Defense will be doubled while he is Chaos , and he uses the attacks Chaos Saber and Satan Slam . Chaos Saber hits all foes with an attack power 2 . 5x stronger than Vincent ' s normal attack , and Satan Slam hits all foes , but with an attack power 5 . 625x stronger than Vincent ' s normal attack power , and has a chance to cause Instant Death . In the PC re - release , obtaining Chaos unlocks the Chaos achievement . " Dirge of Cerberus - Final Fantasy VII - " . Although Vincent retains the ability to turn into Chaos and maintains control of himself at the start , the player cannot transform him into Chaos during gameplay like they can with his Galian Beast form . Chaos becomes playable during the game ' s final level . The form allows him to hover briefly , perform a combo attack consisting of various claw swipes and kicks ending with a sphere of energy , perform a large jump equal to a double jump , and wield a more threatening variation of the Death Penalty gun ( his final weapon from " Final Fantasy VII " ) , which gains power as it collects the souls of the wicked . Non - " Final Fantasy " guest appearances . Chaos can appear as an image when gun is charged , and each charged shots that is fired can create an image of his Limit Break alter egos upon each successful hit . Etymology . Vincent ' s Chaos may have been intended as an allusion to the character of Chaos from the original " Final Fantasy " .