Achievements
Complete each achievement to get the allotted gamerscore:
Adahna Degahna Slayer (100) - Defeat the Chapter 7 boss.
De Ragan Slayer (100) - Defeat the Chapter 3 boss.
De Ragnus Slayer (100) - Defeat the Chapter 8 boss.
Dimmagolus Slayer (100) - Defeat the Chapter 11 boss.
Dulk Fakis 2 Slayer (200) - Defeat the last boss.
Dulk Fakis Slayer (200) - Defeat the Chapter 12 boss.
Magas Maggahna Slayer (100) - Defeat the Chapter 9 boss.
Onmagoug Slayer (100) - Defeat the Chapter 5 boss.
Extra Mode
To unlock Extra Mode, complete Chapter 4 of Story Mode. Extra Mode will then appear on the Title Screen.
New Extra Mode Cast Voices
Complete the game and defeat all forms of the last boss. When you make a new cast character, you will have extra voice options available.