Alternate Custome For Dante 
To unlock Dante's secret custome, simply beat the game with Dante. 

Alternate Custome For Lucia 
To unlock Lucia's secret custome, simply beat the game with Lucia. 

Bloody Palace 
To unlock Bloody Palace, simply beat the game with both characters. 

Lucia/Dante Must Die Mode 
To unlock Lcuia/Dante Must Die Mode, You must beat Dante and Lucia's Hard Mode. 

Lucia's Secret Custome 2 
To unlock Lucia's second secret custome, simply beat Lucia's Hard Mode. 

Unlock Trish From Devil May Cry 
To unlock Trish from Devil May Cry in Devil May Cry 2, simply beat Dante's Hard Mode.