Here is the full list of all 31 9 Monkeys of Shaolin achievements.
Finish the game on Legend difficulty.
Finish the game on Warrior difficulty.
The endless cycle of rebirth.
Complete a mission in co-op mode.
Gain more points than another player.
Revive another player.
Master all styles.
Fully master the second style.
Complete a mission without taking any damage.
Pull 5 enemies with one seal.
Fully master the third style.
Running from difficulties won't solve the problem.
Defeat Fudo.
Finish the game without dying.
Complete all missions.
Collect all weapons.
Collect all items.
Fully master the first style.
Defeat Okina.
Try every type of tea.
Defeat the Kasshiki.
Kill 3 opponents with one strike.
Kill 50 enemies using Qi energy.
Parry 50 attacks.
Defeat Hannya.
Destroy 30 items by throwing enemies into them.
Kill an enemy in the air without touching the ground.
Defeat Shikami.
Deflect projectiles 30 times.
Learn first skill.
Complete the prologue mission.