True Episode 18:
After completing the game, either S rank 5 episodes or just complete 50 episodes to unlock the hidden episode containing the true ending.
Unlock the following Gauges by performing the corresponding tasks:
GAUGE - HOW TO UNLOCK
Augur - Complete all episodes with the Blind Master Gauge equipped.
Blind Master - Achieve a Total Rank of "A" or higher for all episodes.
Defender - Achieve a Total Rank of "A" in three episodes in Part I: Suffering.
Destructor - Achieve a Total Rank of "A" in three episodes in Part II: Rebirth.
Mortal - Achieve a Total Rank of "S" in ten episodes.
Obliterator - Complete all episodes with the Mortal Gauge equipped.
Survivor - Achieve a Total Rank of "A" in ten episodes.
Thermoregulator - Achieve a Total Rank of "A" in three episodes in Part III: Karma.
A Cry of Anger - Activate Burst 50 times.
A Roar of Fury - Activate Burst 100 times.
Anger Management - Activate Burst for the first time in Episode 1.
Art Appreciator - Get all the illustrations.
Be the Fist - Achieve an overall synchronic rate average of 80% on any difficulty.
Can't Touch That - Perform 100 counterattacks.
Can't Touch This - Perform 50 counterattacks.
CG Collector - Get all the CG art.
Denied - Get scolded by your former master in Episode 10.
Heads Will Roll - Completely lose it in Episode 12.
Hit'Em Hard - Defeat 100 enemies with a special attack.
Hit'Em Harder - Defeat 300 enemies with a special attack.
Karma - Complete Part III: Karma.
Lightning Reflexes - Achieve 150 EXCELLENT synchronic impact rankings.
Like a Fish - Consume more alcohol than you should.
Mortal - Achieve a D rank or higher on any episode.
Movie Buff - Get all the movies and interludes.
Pain Is Universal - Accumulate a total of 10000 in damage.
Quick on the Draw - Achieve 70 EXCELLENT synchronic impact rankings.
Rebel with a Cause - Do what you think is right in Episode 13.
Shut Up, Augus! - Interrupt Augus' monologue.
Shut Up, Kalrow! - Interrupt Kalrow's monologue.
Shut Up, Wyzen! - Interrupt Wyzen's monologue.
Sometimes I Feel Like... - Find all the peeping Doji at the hot spring.
Suffering - Complete Part I: Suffering.
Taking Out the Trash - Defeat 300 enemies with heavy attacks and/or lock-on fire.
The Six-Armed Man - Grow a few extra limbs in Episode 5.
The Truth Hurts - Uncover the truth.
The Whole Nine - Get all the gauges.
They Don't Stand a Chance - Defeat 50 enemies while in Unlimited Mode.
Too Legit to Quit - Continue the game after falling in battle.
Unstoppable Force - Defeat 100 enemies while in Unlimited Mode.
View of the Valley - Continue to stare at the hot spring attendant's assets.
Demigod - Complete all episodes with at least an A rank on Normal.
Fighter - Complete all episodes on Normal or higher.
Guardian General - Complete all episodes with at least an A rank on Hard.
It Takes Two - Defeat Deus with Yasha in Episode 17.
Ka-ching! - Accumulate a total of 120000 Battle points.
Look Ma, No Eyes! - Complete the game with the Blind Master gauge equipped.
Rebirth - Complete Part II: Rebirth.
Shinkoku Soldier - Complete all episodes with an S rank on Normal.
Deity - Complete all episodes with an S rank on Hard.
Warrior - Complete all episodes on Hard.
Who Needs Health? - Complete the game with the Mortal gauge equipped.
Enlightenment - Earn all Bronze, Silver, and Gold trophies.
"Episode Pack: Part 4" trophies:
Daddy's Angry - Defy the supreme being in Episode 19.
A Friend in Need - Protect your brother-in-law in Episode 20.
How Do Ya Like Me Now? - Receive a parting gift in Episode 21.
Blaze of Glory - Put an end to your wrath once and for all.
Nirvana - Complete Part IV - Nirvana.
Gaea's Champion - Complete all episodes in Part IV with an S rank on Hard.
"Lost Episode 1" trophies:
A Rebuttal of Fists - Complete all missions in Lost Episode 1.
"Lost Episode 2" trophies:
An Everlasting Catch - Complete all missions in Lost Episode 2.