Here is the full list of all 41 The Bad Kids achievements.
Evade Zhang Dongsheng's attacks
Score 60,000 points on the mini game
Complete all your summer assignments
Finish mom's breakfast
Remain unaffected by mom and clear the stage without losing any lives.
Clear Chapter 1
Run into Auntie Wang Yao and her daughter
An essay about Dad
Witness what happened in the attic
Watch the marionette show
Hide where Wang Yao cannot follow
Clear Chapter 2
Take a group photo of the trio at the mountain peak
Become the best friend with Yan Liang and Pupu
Survive Wang Li's attack
Ssh.
Locate the red pill
Stop copying the memory card halfway and create a blank copy
Clear Chapter 3
Find all the correct doors in the maze without failure
Confront the fox and win
End the story once and for all.
Reach the ending Old Dream
Reach the ending Lifelong Regret
Reach the ending Rebirth
Hear Yan Liang's recollections of the past
Confront the fox and lose
Clear Chapter 4