In Chapter 2, Verse 3 or later, stand in front of the specified telephone in the plaza from Verse 3 while not in a fight, and enter one of the following codes to activate the corresponding cheat function. The "Weapons" phone is the left phone by the stairs. The "Accessories" phone is on the right. The "Characters" phone is the stand alone phone on the other end of the plaza. Note: A certain number of Halos are required to activate the codes.

Bracelet Of Time

Stand in front of the "Accessories" phone, then press Up(4), Down(4), Left, Right, Left, Right, LT. This code requires 3 million Halos to activate.

Climax Bracelet

Stand in front of the "Accessories" phone, then press Up(4), Down(4), Left, Right, Left, Right, RT. This code requires 5 million Halos to activate.

Eternal Testimony

Stand in front of the "Accessories" phone, then press Up(4), Down(4), Left, Right, Left, Right, RB. This code requires 2 million Halos to activate.

Jeanne

Stand in front of the "Characters" phone, then press Up(4), Down(4), Left, Right, Left, Right, B. This code requires 1 million Halos to activate.

Little Zero

Stand in front of the "Characters" phone, then press Up(4), Down(4), Left, Right, Left, Right, X. This code requires 5 million Halos to activate.

Bazillions

Stand in front of the "Weapon" phone, then press Up(4), Down(4), Left, Right, Left, Right, Y. This code requires 1 million Halos to activate.

Pillow Talk

Stand in front of the "Weapon" phone, then press Up(4), Down(4), Left, Right, Left, Right, A. This code requires 1 million Halos to activate.

Rodin

Stand in front of the "Weapon" phone, then press Up(4), Down(4), Left, Right, Left, Right, LB. This code requires 5 million Halos to activate.

Successfully complete all chapters on the Normal difficulty to unlock the Hard difficulty.

Successfully complete all chapters on the Hard difficulty to unlock the Non-Stop Infinite Climax difficulty.

Get a "Platinum" rank on all results on the Normal difficulty to unlock Jeanne. Alternately, unlock the "Eternal Marionette" accessory.

Successfully complete the "Lost Chapter" to unlock Little Zero.

Successfully complete the indicated task to unlock the corresponding weapon (or LP):

Bazillions: Successfully complete the game on the Hard difficulty.
Handguns: Successfully complete the game on the Normal difficulty.
Pillow Talk: Successfully complete the game on the Non-Stop Infinite Climax difficulty.
Rodin: Purchase the "Platinum Ticket", and defeat Father Rodin.
Sai-fon: Successfully complete 100 chapters on the Normal or higher difficulty.

Successfully complete all chapters on the Normal difficulty. Load the cleared saved game file, then go to "Gates Of Hell". Enter the "Rodin's Treasure" menu, and purchase the "Super Mirror" for 100,000 Halos to get the Umbran Komachi (Kimono). The other alternate costumes (listed as "Couture Bullets") will now be unlocked for purchase for 100,000 Halos. Note: To change costumes, press R1 at the "Chapter Start" screen, then select the "Costume Change" option. The following are the available costumes for purchase:

Couture Bullet (d'Arc)
Couture Bullet (Nun)
Couture Bullet (Old)
Couture Bullet (P.E. Uniform)
Couture Bullet (Queen)
Couture Bullet (Umbra)
Couture Bullet (Various)

Successfully complete the indicated task to unlock the corresponding item in Rodin's shop for purchase:

Bracelet Of Time: Successfully complete the game in under three hours on Normal or higher difficulty.
Climax Bracelet: Get 101 Umbran Tears Of Blood.
Eternal Testimony: Get 50 Umbran Tears Of Blood.
Immortal Marionette: Successfully complete the game on the Very Easy or Easy difficulty.

Successfully complete the game to unlock the "Bonus Gallery" option at the main menu, which allows access to the game's concept art, cutscenes, and other extras.

During the entire opening cutscene of Chapter VIII or XIV, hold LT + LB to hear retro Afterburner and Space Harrier music during the stage.

When Bayonetta is sucking a lollypop in a cutscene, take note of its color. Hold the controller button that matches the color of the lollypop to get an item. For example, if the lollypop was green, hold A during the cutscene to get a green herb lollypop.

Accomplish the indicated achievement to get the corresponding number of Gamerscore points:

A Primer In The Magical Arts (10 points): Complete the Vestibule.
Fortitudo, Bringer Of Flame (15 points): Defeat ????? on any difficulty.
Temperantia, Manipulator Of Wind (15 points): Defeat ????? on any difficulty.
Iustitia, Giver Of Life (15 points): Defeat ????? on any difficulty.
Sapientia, Controller Of Seas (15 points): Defeat ????? on any difficulty.
Master Of The Heavens (15 points): Defeat ????? on any difficulty.
Taste Of The Witching Hour (30 points): Complete all Chapters on any difficulty.
Chapters 1-4 (Normal) (20 points): Complete Chapters 1 through 4 on Normal difficulty.
Chapters 5-7 (Normal) (20 points): Complete Chapters 5 through 7 on Normal difficulty.
Chapters 8-11 (Normal) (20 points): Complete Chapters 8 through 11 on Normal difficulty.
Umbra Witch (20 points): Complete all Chapters on Normal difficulty.
New Testament: Ch. 1-4 (Hard) (20 points): Complete Chapters 1 through 4 on Hard difficulty.
New Testament: Ch. 5-7 (Hard) (20 points): Complete Chapters 5 through 7 on Hard difficulty.
New Testament: Ch. 8-11 (Hard) (20 points): Complete Chapters 8 through 11 on Hard difficulty.
Umbra Elder (40 points): Complete all Chapters on Hard difficulty.
Legendary Dark Witch (100 points): Complete all Chapters on ???? Difficulty.
I'm A Bit... I Mean Witch. (5 points): Execute a Torture Attack.
Feels Good, Doesn't It? (20 points): Execute 50 Torture Attacks.
You Want To Touch Me? (10 points): Engage Witch Time successfully 10 times.
Nice Try (20 points): Engage Witch Time successfully 10 times consecutively.
Platinum! (20 points): Earn 10 Platinum Medals. Must be earned in 10 different battles.
Double, Double, Toil And Trouble (10 points): Create 20 Concoctions.
Tread Not So Softly (10 points): Kill an enemy by jumping on top of them.
Nice And Relaxed (5 points): Avert 10 enemy attacks with the Moon of Mahaa-Kalaa equipped.
Touch And It Will Hurt (15 points): Counter 10 enemy attacks with the Moon of Mahaa-Kalaa equipped.
Touch And It Will REALLY Hurt (25 points): Counter three enemy attacks consecutively with the Moon of Mahaa-Kalaa equipped.
Come Here, Little Boy (30 points): Taunt and defeat five plus angered enemies while taking no damage. Gaze of Despair may be equipped.
Wicked Weaver (10 points): Execute a Wicked Weave attack while using Dodge Offset.
Wicked Weave Master (20 points): Execute 20 Wicked Weave attacks while using Dodge Offset.
The Deepest Cut (20 points): Kill 20 enemies using only Iai-Jutsu with Shuraba. (Iai-Jutsu performed by holding the Y button.)
Higher And Higher (20 points): While never setting foot on the ground, grab enemies 10 times using Kulshedra.
The Ice Witch (20 points): ????? 20 enemies while wearing ?????
Seeker Of Magic (10 points): Purchase three new techniques.
Commander Of Magic (20 points): Purchase all techniques.
Record Collector (10 points): Obtain three complete Angelic Hymn Gold LPs.
Record Fanatic (20 points): Obtain ????? complete Angelic Hymn Gold LPs.
Treasure Collector (10 points): Discover half of all the Umbra Witches' final resting places.
Treasure Fanatic (20 points): Discover all of the Umbra Witches' final resting places.
The Path To The Heavens (30 points): Discover all Alfheim portals.
Angel May Cry (20 points): Complete half of all Alfheim portals.
Angel Slayer (30 points): Complete all Alfheim portals.
Truth In Its Purest Form (30 points): Collect all of Antonio's Notes.
Naughty Tentacles (20 points): Destroy all the tentacles that drop down together during in single sequence in Chapter 9.
A Mother's Love (20 points): Defend ????? during the ???????, ensuring ????? takes no damage.
Fire The Afterburners (20 points): Earn Platinum Medals during Verse 1 and Verse 2 of Chapter 14.
Just In The Nick Of Time (5 points): Dodge the ?????? during Chapter 2.

Additionally, there are four secret achievements:

Chapters 12-13 (Normal) (20 points): Complete Chapters 12 and 13 on Normal difficulty.
Chapters 14-Epilogue (Normal) (20 points): Complete Chapters 14 through the Epilogue on Normal difficulty.
New Testament: Ch. 12-13 (Hard) (20 points): Complete Chapters 12 and 13 on Hard difficulty.
New Testament: Close The Book (20 points): Complete Chapters 14 through the Epilogue on Hard difficulty.