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.
CPU White Heart joins the party.
Switched with back-row members in battle 50 times.
CPU Black Heart joins the party.
CPU Green Heart joins the party.
Helped a wounded ally during battle 20 times.
Cleared the main scenario.
Assembled the legendary weapon, Wisdom Bow.
Assembled the legendary weapon, Trust Spear.
Reached 100 HIT with your original Combo.
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 Leanbox.
Neptune returns to the party.
Obtained the Key Fragment in Lowee.
Defeated the monster in town.
Gust joined the party.
Obtained the Key Fragment in Lastation.
But it was the best demo ever.
Nisa joined the party.
Arrived at Lastation.
Returned to Planeptune.
Arrived at Leanbox.
Arrived at Lowee.
Changed your accessory.
Created an original Combo.
Changed your processor unit.
Used Explore to advance the story.
Connected Combos using Combo Link.
Fought in battle as a CPU.
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.
Changed your formation.
Started your journey in Gamindustri.