Disgaea: Afternoon of Darkness

Unlock Etna mode:
Read Etna's diary in each chapter, then finish the game.

Etna mode cheat code:
When you are at the title screen, highlight the "New Game" option, then press
Triangle, Square, O, Triangle, Square, O, X. If you entered the code correctly,
you will hear Etna's voice.

To enter Etna's room, press the two secret buttons in Laharl's Castle.
Look behind the throne, and look inside the skull on the counter in
RosenQueen's store to find the buttons. Press both of buttons, then go
to the room where Longinus, Ghoss, Stigma, and Gargo are usually found.
To reveal the secret door, press X in the corner behind Stigma.


Unlockable bonus classes:

Star Skull:
This class unlocked by getting a Fire, Ice and Wind Skull all to level 5.

Star Mage:
This class unlocked by getting a Fire, Ice and Wind Mage all to level 5.

Scout:
This class unlocked by getting two Fighters or Warriors, Males or
Females each to level 5 or higher.

Ronin:
This class unlocked by getting a Female Warrior and Female Fighter both
to level of 20 or higher.

Prism Skull:
This class unlocked by getting a Star Skull to level 35.

Prism Mage:
This class unlocked by getting a Star Mage to level 35.

Ninja:
This class unlocked by getting a Male Fighter and Male Warrior both at
level of 10 or higher.

Majin:
This class unlocked by getting a Male Warrior, Brawler, Ninja, Rogue and
Scout all at level 200 or higher.

Knight:
This class unlocked by getting Female Warrior and Female Mage both at
level 10 or higher.

Galaxy Skull:
This class unlocked by getting a Prism Skull to level 50.

Galaxy Mage:
This class unlocked by getting a Prism Mage to level 50.

EDF Soilder:
This class unlocked by getting level 30 or higher Gun Weapon Mastery.

Archer:
This class unlocked by getting level 3 or higher in Bow Weapon Mastery.

Angel:
This class unlocked by getting Female Cleric, Knight and Archer all at
level 100 or higher.