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