Here is the full list of all 51 Disgaea 5 Complete achievements.
Condition：Obtain all other trophies.
Clear Ep. 7: Past Struggles Part 1. "Bro!"
Clear Ep. 8: Past Struggles Part 2. "Master!!!"
Clear Ep. 6: The Sixth Warrior. "Dance of the Bristle Grass!"
Discover 100 Netherworlds. "Find new frontiers!"
Get 50 One Time Bonuses. "You're taking all the bonuses!"
Eat curry for 100 days straight. "They're demons so they're fine. Please don't try this at home."
Deal over 10,000,000,000 damage. "Blow 'em away!"
Reach the goal in the Chara Word. "Congratulations!"
Complete 20 quests. "We'll accept any quest."
Call your Netherworld for the first time. "If you call it...it will come."
Perform 20 combos. "Finish 'em off all at once!"
Achieve a population of 100 in the pocket Netherworld. "The pocket Netherworld has gotten pretty crowded."
Nullify all Geo Panels with a Geo Chain of 5 or more. "Find the trick and erase all of them at once!"
Hit allies inside the base 100 times. "Be gentle."
Unlock all character classes. "Master every path possible!"
Max out an item's level. "Annihilate enemies with the weapons you've modified!"
Conquer the Carnage Dimension. (Defeat Carnage Dark) "This is the ultimate power!"
Obtain an epic item. "This is sweet!"
Obtain the legendary weapon in the Item World. "Only the chosen one can equip it..."
Experience the effects of the hot springs in an Item World Mystery Room. "No peeking on the girls' side."
Jump 1,000 times at the base. "Once you hop, you just can't stop."
Reach the goal in the Chara World on Super Overlord difficulty. "It takes a lot of gaming to get this far."
Enter the Carnage Dimension. "We can't lose to the overwhelming power of Carnage!"
Defeat Proto Darkdeath in the Item World. "Wh-Who is this guy...!?"
Obtain more than 10,000,000,000 HL. "So, whatcha gonna blow it all on?"
Repel a Netherworld in the Item World. "Just another day for you and me in the Netherworld."
Watch 20 skits. "Enjoy the daily lives of demons."
Pass a bill that gives you a Trophy. "Yes, you earned it."
Perform a Combo Skill for the first time. "This is the power of bonds!"
Clear Final Ep.: Dedicated to the Precious People. "I'll save her, no matter what!"
Clear Ep. 15: The Ultimate Skill. "Excellent..."
Level up to Lv 9999. "It's just a destination, not the final stop!"
Clear Ep. 14: Seraphina's Secret. "A girl in love is invincible!!!"
Capture 100 prisoners. "Round them up!"
Clear Ep. 13: The Two Killias. "...Yeah, farewell."
Clear Ep. 12: Unbridled Killia. "The one who leaves destruction in his wake."
Activate Revenge Mode 100 times. "Your hatred makes you powerful!"
Clear Ep. 11: Netherworld Extinction. "They are all irreplaceable."
Clear Ep. 10: The Memorable Special Sweet Curry. "Our...beloved daughter..."
Clear Ep. 9: The New Power. "Guuurrryaaahhh!!!"
Clear Ep. 5: The One Who Controls Death. "Kill and Recycle!"
Clear Ep. 4: Yellow, Rabbit, and Curry. "I want curry, I want curry, I want curry, I want curry..."
Get a Game Over. "Let this humiliation fuel your strength."
Completely fill the Bonus Gauge. "Take everything!"
Clear Ep. 3: His Name is Zeroken. "A silver white shadow that creates a storm..."
Pass a bill by Paying Up 100,000,000 HL. "I hope it's worth it!"
Force the Dark Assembly to approve a bill. "In the end, it's all about the 'Aye.' "
Clear Ep. 2: Demon General. "Madam Seraphina, hooray!"
Use an Overload skill for the first time. "Watch closely for the power of an Overlord."
Clear Ep. 1: Prelude to Vengeance. "The story of rebellion starts now!"