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