Beat the game with the Best ending to unlock Hard difficulty, Boss Rush Courses 2 and 3, Richiter and Sisters mode, Sound mode, and New Game +.
Beat the game on Hard difficulty to unlock a permanent +50 Luck bonus.
Old Axe Armor:
To unlock the ability to play as an Old Axe Armor, kill 1,000 Old Axe Armors and beat the game. Then, start a new game.
Bonuses:
Unlock the following bonuses by performing the corresponding tasks:
Konami Man and +50 Strength - Beat the game on Hard difficulty with Level 1 Cap
Magus Ring (regenerates magic points faster) - Beat all of Wind's quests
Twin Bee and +50 Intelligence - Beat the game on Hard difficulty with Level 25 Cap
Vic Viper and +50 Luck - Beat the game on Hard difficulty with Level 50 Cap
Fully Powered Vampire Killer:
To fully power-up the Vampire Killer, use the Sanctuary spell on Stella and Loretta when you fight them. The sisters will no longer be evil, and will offer to unlock the Vampire Killer's full potential. Speak to them to start an optional Boss battle. Win the battle to fully power-up the Vampire Killer.
Boss Rush mode bonuses:
Unlock the following bonuses by beating the corresponding course within the specified time in Boss Rush mode:
Astral Ring - Beat Course 1 in under one minute.
Illusion Fist - Beat Course 2 in under five minutes.
Invisible Cape - Beat Course 1 in under three minutes.
Record 1 - Beat Course 2 in under three minutes.
Record 2 - Beat Course 3 in under three minutes.
Scout Armor - Beat Course 3 in under five minutes.
Easy SP:
To easily gain SP, you must be able to access the 13th Street portrait, have the Undead Killer, and a lot of tonics. Go to 13th Street and use the warp to the second warp room. Walk out the room, and jump up on the platforms and into the next room. There will be three Red Axe Armors walking back and forth. Use your sub-weapon, and make sure it makes contact with all three Red Axe Armors. Then, equip the Undead Killer and kill the three Red Axe Armors. You will then get 12 SP for each Red Axe Armor.
Hidden Vincent dialogue:
To hear a hidden Dialogue from Vicent the shopkeeper, play as Charlotte and stand in front of him while holding up until he begins speaking.
Alternate dialogue:
To toggle the dialogue from English to Japanese, at the main menu, while holding L press A.
Duplicate quest rewards:
To earn the same quest reward more than once, beat a quest and then talk to Wind to display the quest menu. Press A, A, and when you hear the reward chime, press Start to exit. You will have the quest reward and the quest will display as uncompleted in the list. Complete the quest again to get the reward again. Repeat as desired.
Start with full map:
To start a game with a fully completed map with Old Axe Armor, Richter, or Sisters, beat the game with Jonathan. Select, the New Game+ bat icon located on your cleared game file with Jonathan. At the Normal or Hard difficulty screen, press B to cancel and go back. Go to any blank file and start a new game with Old Axe Armor, Richter, or Sisters with a fully completed map.
Birthday cake:
To make Vincent offer you a birthday cake for 3,000, change your birthday in the DS system settings to the current date.
