Here is the full list of all 51 3D Dot Game Heroes trophies - there are 42 bronze, 5 silver, 3 gold and 1 platinum.
Congratulations! Thank you for playing this far!
Cleared Spelunker mode.
Survived Spelunker mode for 10 hours.
Acquired all the swords.
Maxed out the LIFE bar.
Visited all maps.
Cleared the game in FROM mode.
Cleared the game with the princess restored.
Maxed out the Giga Sword.
Maxed out the MAGIC bar.
Spent the night in Raejack with the princess.
The princess was restored to her true form.
You found Ai.
You found Sue.
Cleared the Spelunker event.
Acquired the Holy Sword.
Booked all monsters in the Bestiary.
Booked Onyx in the Bestiary.
Booked Fuelle in the Bestiary.
Booked Dark Knight in the Bestiary.
Booked Dragon in the Bestiary.
Booked Giga Golem in the Bestiary.
Booked Queen Bee in the Bestiary.
Booked Kraken in the Bestiary.
Cleared the game without dying.
Cleared the game without restoring the princess.
Defeated Onyx without taking damage.
Acquired the Hero Shield.
Defeated Fuelle without taking damage.
Defeated Dark Knight without taking damage.
Acquired the Hero Sword.
Booked Eelagon in the Bestiary.
Booked a monster in the Bestiary.
Acquired a sword from King Block.
Defeated Dragon without taking damage.
Defeated Kraken without taking damage.
Played the game for five hours.
Defeated Giga Golem without taking damage.
Defeated a foe with a bomb.
Made your sword stronger at the blacksmith.
Defeated Queen Bee without taking damage.
Collected 777G.
Used a Shader Magic.
Defeated a foe with a bow.
Took a snapshot.
Defeated Eelagon without taking damage.
Guarded an attack.
Acquired the Ancient Sword.
Defeated a Guardian.
Defeated a foe with a sword.
Made a character model.