Here is the full list of all 44 Mommy achievements.
Use computer 20 times
Read the last page of the comic.
Complete snowy land
Die from the avalanche
Compete grassy land
Die from darkness
Use computer 10 times
Die from trap
Kill 50 eyes in mini game
Die from slime
Complete candy land
Die from the mutant-slime
Kill 20 eyes in mini game
Kill 10 eyes in mini game
Kill 5 eyes in mini game
Complete 30 levels in 5.0 mini game
Complete 20 levels in 5.0 mini game
Use computer 5 times
Complete 10 levels in 5.0 mini game
Complete 5 levels in 5.0 mini game
Use computer
Die from frog
Die from spike or from falling into the abyss