Here is the full list of all 58 Sayaka achievements.
Kill17
To be Continued
Kazuma
Go Home
Chando
Kill22
Kill19
Kill21
Hit
Kill20
Kill18
Prepare
Now What?
Mercy
Fuji
Kill15
Kill16
Kill14
Kill13
Kill12
Kill11
Kill10
Kill9
Kill8
Again!
Inner alley
Blue door
Koji
Kill6
Kill7
Kill5
Kill4
Kill3
Kill2
Kill1
Killing Time
Fifth Blood
Third Blood
Fourth Blood
Second Blood
First Blood
Intruder
Take your first steps
Later
Mission Accepted
Start
Hello