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