Level 1:
Galian Beast: Vincent heals himself and gives himself extra HP. He attacks with Beast Flare and Bererk Dance.
Level 2:
Death Gigas: Transforms into a Frankenstein-like monster. He attacks one enemy for fair damage with Gigadunk, and shocks all opponents with Livewire.
Level 3:
Hellmasker: Attacks enemies with a five hit combo, and also puts curses on them.
Level 4:
Chaos: Vincent transforms into Chaos and uses 2 very powerful attacks: Chaos Saber and Satan Impact.
To get this limit, you'll have to take your submarine through a tunnel hidden in the side of an underwater mountain. You'll rise up into a little lagoon with a cave in it. Enter the cave with vincent in your party, and he'll talk to his lost love, Lucresia. Leave the cave, then re-enter it after a little while. Walk up to the top of the room, and hit the 0 button to receive his Limit manual, plus his Ultimate weapon, the Death Penalty.