Here is the full list of all 22 Kaede the Eliminator / Eliminator achievements.
Achieve 50 head shots
Achieve 100 head shots
Kill 100 enemies
Kill 1000 enemies
Dive into a dam hole
Vomit 10 times
Destroy all dolls
Kill yourself
Unlock all clothes
Get Rank 'SSS' on Survival mode
Collect all Research records
Collect all Posters
Solve a very simple cipher
Solve a difficult cipher
Use Drinks 30 times
Use foods 40 times
Shoot down 10 balloons floating above the dam lake
Unlock all Trophies
Get Rank 'SSS' on Sniper mode by only use normal bullets
Get Rank 'SSS' on Sniper mode
Clear all Extra Missions
Total time of Extra Missions is 12 minutes or less