Here is the full list of all 27 Night Blights achievements.
1 Shot 2 Blights!
Completed Sunday
50 kills on Sunday
25 kills on Sunday
Killed your first Blight
Harassed by Teddy
Completed Saturday
Earned 18 Stars
Completed Friday
Earned 15 Stars
Killed by a Blight
Completed Thursday
Completed Wednesday
Completed Tuesday
Completed Monday
Fed your first Blight
Earned 21 Stars
Saved Robo Chris
Found the toy source
Got locked in the car
Found the Blight Cave
Score with a toy
No sprint on Wednesday
Play Survival Mode
Survived until 2am
Survived until 3am
Survived until 4am