Chaos (Final Fantasy VII)

Chaos appears in the game Final Fantasy VII and its sequel Dirge of Cerberus -Final Fantasy VII-. Chaos has a very minor role in Final Fantasy VII as it appears as just a Limit Break for the character Vincent Valentine, however, it has a much larger role in Dirge of Cerberus -Final Fantasy VII- being a part of the storyline and having a lot of information released about it.

Final Fantasy VII
Chaos' role in Final Fantasy VII is as a Limit Break for Vincent Valentine. He is Vincent's ultimate limit break and can be obtained by visiting the Crystal Cave, watching the events there, returning after fighting 10 battles and examining the altar to recieve the neccesary manual. To then use the manual Vincent must have already obtained his other Limit Breaks.

Besides this Chaos has no other purpose in the game and if Vincent Valentine is not obtained, as he is an optional character, the player can bypass seeing Chaos at all.

In-Battle
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 Defence and Magic Defence 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 2.5 times stronger than Vincent's normal attack and Satan Slam also hits all foes but with an attack power 5.625 times stronger than Vincent's normal attack power and also has a chance to cause Death.