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