Here is the full list of all 51 Ninja Gaiden Σ2 trophies - there are 38 bronze, 10 silver, 2 gold and 1 platinum.
Obtain all trophies.
Successfully perform the Reverse Wind technique.
Successfully perform the Furious Wind technique.
Successfully perform the Shadowless Footsteps technique.
Successfully perform the Flying Swallow technique.
Successfully perform the Flying Bird Flip technique.
Successfully perform the Obliteration Technique.
Successfully perform the Ultimate Technique.
Successfully perform the Ultimate Guidance technique.
Successfully perform the Counter Attack technique.
Successfully perform the Unrivaled Soaring technique.
Successfully perform the Invisible Path technique.
Successfully perform the Izuna Drop technique.
Successfully perform the Guillotine Throw technique.
Successfully perform the Art of the Inferno Ninpo.
Successfully perform the Art of the Wind Blades Ninpo.
Successfully perform the Art of the Flame Phoenix Ninpo.
Successfully perform the Art of the Piercing Void Ninpo.
Successfully complete Chapter 1.
Successfully complete Chapter 4.
Successfully complete Chapter 7.
Successfully complete Chapter 10.
Successfully complete Chapter 13.
Clear the game on the PATH OF THE ACOLYTE.
Clear the game on the PATH OF THE WARRIOR.
Clear the game on the PATH OF THE MENTOR.
Clear the game on the PATH OF THE MASTER NINJA.
Master the PATH OF THE ACOLYTE.
Master the PATH OF THE WARRIOR.
Master the PATH OF THE MENTOR.
Master the PATH OF THE MASTER NINJA.
Achieve a 100-hit combo with any weapon.
Defeat 1000 enemies using Obliteration Techniques.
Defeat 1000 enemies using Ultimate Techniques.
Successfully use the Izuna Drop on 1000 enemies.
Successfully use the Guillotine Throw on 1000 enemies.
Defeat 1000 enemies with the Dragon Sword.
Defeat 1000 enemies with the Lunar Staff.
Defeat 1000 enemies with the Falcon's Talons.
Defeat 1000 enemies with the Dual Katana.
Defeat 1000 enemies with the Kusari-gama.
Defeat 1000 enemies with the Eclipse Scythe.
Defeat 1000 enemies with the Tonfa.
Defeat 1000 enemies with the Vigoorian Flail.
Defeat 1000 enemies with the Enma's Fang.
Chant 100 Ultimate Ninpo spells.
Rescue 100 people in need.
Defeat 1000 enemies in Ayane.
Defeat 1000 enemies in Momiji.
Defeat 1000 enemies in Rachel.
Successfully complete all missions.