Galian Beast:
Vincent turns into a purple beast that does fire based attacks.
Beast Flare:
Vinnie throws orbs at his enemies which explode to damage all enemies.
Berserk Dance:
Vincent does a combo attack on an enemy.
Death Gigas:
Vincent turns into a creature that has a striking resemblance to Frankenstein. He does Physical and Lightning attacks in this form.
Gigadunk:
Vincent punches an enemy.
Livewire:
Vincent attacks all enemies with an electical charge. [ Handy to jump start a car!]
Hellmasker:
Vincent turns into a lunatic with a chainsaw.[ Hmm.. This sounds familiar!]
Splattercombo:
Vinnie does it blood style by ripping monsters to shreddies 5 times with his chainsaw.
Nightmare:
This is a great attack that can cause all kinds of status ailments
Chaos:
Vincent turns into a winged demon and uses powerful, non-element attacks.
Chaos Saber:
This is just like slash-all but doesn't use Vincent's weapon.
Satan Slam:
This powerful attack creates a large skull that causes massive damage to all opponents. Not only that, but any survivors after are damaged by the flaming skulls.
How to get Chaos:-
Chaos is obtained at the same time as Death Penalty. You have to have a Gold Chocobo or the Submarine. Then go to the river that intersects with the Gold Saucer. There is a cave behind the waterfall there. Come here at the end of Disc 2 or the start of Disc 3 with Vincent in your party to get it.