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