Here is the full list of all 51 Disgaea 4: A Promise Revisited trophies - there are 42 bronze, 5 silver, 3 gold and 1 platinum.
Complete all other trophies.
Defeat God (self-proclaimed). "Infernal demon, follow my order and present your vile soul!"
Collect all types of items.
Collect all Pirate Ship parts.
Inflict 10,000,000,000 damage.
Defeat Pringer X: Poison in the Land of Carnage. "Pringer Z is back, baby!"
Defeat Tyrant Overlord Baal in the Land of Carnage. "Whosoever unlocks this trophy, shall possess the title of Tyrant Overlord."
Watch every special skill animation.
Clear the Fuka & Desco Show. "Final Formation! We are Tri-Angels!"
Max out an item's level.
Defeat Prinny Kurtis in the Post Game and make him an ally. "Can you handle Mach 5!?"
Win the Netherbattle Tournament. "I want my own catchphrase."
Open all treasure chests in the base.
Go to the Land of Carnage and regret it.
Defeat Zetta in the Post Game and make him an ally. "I'll show you what a real strategy RPG is all about!"
Have characters of every rank of every creatable class.
Clear all X-Dimension stages. "You've conquered Dimension X!"
Defeat Asagi in the Post Game and make her an ally. "I'll show you my Super Miracle Heroine Powers!"
Defeat Laharl in the Post Game and make him an ally. "Taste the power of Overlord Laharl!"
Watch Emizel's epilogue. "Wandering messenger of twilight, show me the ways of this world!"
Watch Desco's epilogue. "Cretins...bow down and worship me! For I am Desco!"
Watch Fuka's epilogue. "Come, iron roc!"
Watch Fenrich's epilogue. "All is for my Lord."
Get over 100,000,000 HL.
Train 100 times.
Persuade by force 3 times.
Clear the Flashback Episode. "Demon trapped in fire, I shall temporarily free your chaotic soul. Now! Become my power!"
Destroy the Axel statue in battle.
Explode ten Prinnies in a row.
Inflict 100,000 damage.
Max out the Rosen Queen Co. customer level.
Defeat Etna in the Post Game and make her an ally. "Look at my body and drool!"
Clear the Time Leap story. "Brave warrior, hear my voice... Become the skyward sword that pierces the darkness, and crush my enemies!"
Defeat Raspberyl in the Post Game and make her an ally. "Which Honor Student wants to take my lesson?"
Defeat Archangel Flonne in the Post Game and make her an ally. "Chaos sucks! Guardian of justice, Justice Flonne!"
Defeat Axel in the Post Game and make him an ally. "Axel, on staaage!"
Clear the main story, and begin the Post Game.
Watch Artina's epilogue. "Mother of the sublime glow, bring purity to the swirling evil!"
Clear Ep. 9: The Moon, Earth, and the Promise!
Clear Ep. 8: Battle! Final Boss vs. Final Boss.
Clear Ep. 7: Battle! Tyrant vs. President.
Clear Ep. 6: The A-Virus Pandemic.
Clear Ep. 5: The Angel of Avarice.
Capture an enemy.
Clear 30 floors in the Item World.
Clear Ep. 4: Death Emizel's Death.
Clear Ep. 3: Enter the Final Weapon.
Clear Ep. 2: Prinny Wars.
Lose a battle.
Clear Ep. 1: Rebels of Hades.
Watch the opening anime to the very end.