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