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