Here is the full list of all 51 Way of the Samurai 3 trophies - there are 42 bronze, 5 silver, 3 gold and 1 platinum.
Acquired all the Trophies.
Mastered all skills of Lower Stance.
Mastered all skills of Spear Stance.
Mastered all skills of Ninja Stance.
Mastered all skills of Single Stance.
Mastered all skills of Draw Stance.
Mastered all skills of Side Stance.
Mastered all skills of Middle Stance.
Mastered all skills for thirty weapons.
Mastered all skills of Upper Stance.
Completed and discovered all Endings.
Obtained 20 titles.
Learned a total of 100 skills.
Cleared the game in Instant Kill difficulty.
Cleared game with more than 120% Samurai Rating.
Completed and discovered the True Ending.
Completed and discovered 5 Endings.
Mastered all skills of Ninja Dual Sword Stance.
Mastered all skills of Dual Sword Stance.
Mastered all skills of Bare Hands Stance.
Cleared the game in Hard difficulty.
Obtained 50 different weapons.
Total Samurai Points exceeded 10000 points.
Obtained all Outfits.
Obtained all Heads.
Total Samurai Points exceeded 2000 points.
Defeated Shuzen Fujimori.
Completed 50 jobs successfully.
Obtained 5 titles.
Defeated an enemy with Blunt Attack using a weapon with zero durability.
Killed an enemy using a weapon with zero durability.
Created a weapon.
Cleared the game in Normal difficulty.
Played more than 10 hours.
Broke an opponent's weapon.
Obtained a partner.
Obtained an extra Sword Safe.
Defeated Sensei at the Dojo.
Mastered all skills for a weapon.
Achieved 100 Chain Kills.
Completed the game.
Cleared the game in Easy difficulty.
Total Samurai Points exceeded 200 points.
Learned a total of 10 skills.
Defeated an opponent with a Blunt Attack.
Forged a weapon for the first time.
Obtained 10 different weapons.
Achieved 10 Chain Kills.
Learned a skill for the first time.
Completed a job successfully.
Fist time killing an enemy.