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