Here is the full list of all 46 Hyperdimension Neptunia trophies - there are 34 bronze, 8 silver, 3 gold and 1 platinum.
You've been diagnosed with Neptunia.
Obtained all content.
Defeated Arfoire with the power of all CPUs combined.
Obtained S rank in all Time Challenges.
Been everywhere in Gamindustri.
Helped a wounded ally during battle 20 times.
CPU White Heart joins the party.
CPU Green Heart joins the party.
Switched with back-row members in battle 50 times.
Changed your formation.
CPU Black Heart joins the party.
Cleared the main scenario.
Assembled the legendary weapon, Trust Spear.
Assembled the legendary weapon, Wisdom Bow.
Assembled the legendary weapon, Dual Revolver.
Assembled the legendary weapon, Trinity Blade.
The truth about Arfoire is revealed.
Released Histoire's seal.
Obtained the Key Fragment in Lastation.
But it was the best demo ever.
Obtained the Key Fragment in Lowee.
Obtained the Key Fragment in Leanbox.
Neptune returns to the party.
Defeated the monster in town.
Reached 100 HIT with your original Combo.
Connected Combos using Combo Link.
Changed your accessory.
Gust joined the party.
Nisa joined the party.
Returned to Planeptune.
Fought in battle as a CPU.
Arrived at Lowee.
Arrived at Leanbox.
Changed your processor unit.
Arrived at Lastation.
Created an original Combo.
Used Explore to advance the story.
Had your first battle on your new journey.
Found a hidden treasure.
Encountered IF.
Purchased something at the Shop.
Cleared the tutorial dungeon.
You used your synthesized item during battle.
Lured out a monster.
Destroyed an obstacle.
Started your journey in Gamindustri.