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