Here is the full list of all 44 Shadow Tactics: Blades of the Shogun - there are Aiko's Choice achievements.
Collect 17 badges.
Find all hidden caves in Hana Gakuen.
Kill a samurai with a rock.
Use Aiko's disguise 15 times.
Finish all missions.
Listen to everything Kuma has to say.
Finish “The Secrets of Hana Gakuen”.
Kill Lady Chiyo with any character other than Aiko.
Kill Lady Chiyo without getting a disguise.
Kill a guard with a drop attack from a rope.
Kill or knock out 5 guards at the same time with all 5 characters.
Kill 30 guards with the help of the environment.
Kill 10 guards with traps in Hana Gakuen.
Hide with all characters in a single bush.
Fail the Shrine riddle at the beginning 3 times.
Don't kill anyone with Takuma during the mission “The Best Laid Plans.”
Distract 50 guards with Hayato's stone.
Execute a plan with all 5 characters.
Kill 3 Samurai with Yuki.
Kill 10 guards with Takuma's Sniper Rifle that are farther than 25 meters away from him.
Finish the mission “Red Lights at Matsuyama”.
Don't extinguish any light sources in Matsuyama.
Finish the mission “The Best Laid Plans”.
Kill the Captain.
Travel 1200 meters in water during the mission “The Best Laid Plans”.
Hide 150 bodies.
Kill a Samurai with a flower pot.
Find the perfect spot for sunbathing.
Kill or knock out 150 guards.
Finish the mission “A Night at Sea”
Distract 4 guards at the same time with Kuma.
Kill at least 3 guards in the mission “A Night at Sea”.
Hide 100 bodies.
Throw a guard into a well.
Come out of the other side of the river in Nagoya.
Talk to a samurai when disguised with Aiko.
Finish the mission “Reunion at Nagoya”.
Kill all enemies at the mansion in Nagoya.
Kill 20 guards with Mugen's Swordwind.
Kill or knock out 100 guards.
Kill 10 guards with a drop attack.
Hide 50 bodies.
3 times in one mission, kill 2 guards at once with Mugen's Swordwind.
Kill or knock out 50 guards.