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