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.
CPU Green Heart joins the party.
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 Leanbox.
Neptune returns to the party.
Obtained the Key Fragment in Lowee.
Defeated the monster in town.
Obtained the Key Fragment in Lastation.
But it was the best demo ever.
Reached 100 HIT with your original Combo.
Helped a wounded ally during battle 20 times.
Switched with back-row members in battle 50 times.
Gust joined the party.
Nisa joined the party.
Arrived at Leanbox.
Returned to Planeptune.
Arrived at Lastation.
Arrived at Lowee.
Changed your accessory.
Created an original Combo.
Purchased something at the Shop.
Changed your processor unit.
Used Explore to advance the story.
Connected Combos using Combo Link.
You used your synthesized item during battle.
Found a hidden treasure.
Fought in battle as a CPU.
Had your first battle on your new journey.
Encountered IF.
Changed your formation.
Cleared the tutorial dungeon.
Lured out a monster.
Destroyed an obstacle.
Started your journey in Gamindustri.