Here is the full list of all 42 Pleh! achievements.
The base game contains 41 achievements, and there is 1 DLC pack containing 1 achievements.
This door was not one of them
Cracked the mainframe
I wish we could stay like this forever
If you're reading this, BIOSener.config installed correctly. If you're not reading this, BIOSener.config did not install correctly
10.17
Quit the game at the warning screen
I bet you think you're so funny.
I respect your wishes.
Thank you VERY much for playing!
Agony
Find all 10 hidden transcripts
Please leave me alone
Dullness
Walk backwards for 10 seconds
Push the chair 1500 times
Push the chair 500 times
Push the chair 100 times
Push the chair 50 times
Consider this your final warning
I AM EVERYWHERE
Disappointment
Type "null" when null
Demotivation
Depression
Misery
Thank you for watching the credits!
I should have known.
Carry on.
Anxiety
Please don't take me away...
Sing happy birthday twice
Remember to wash your hands!
A clock, a piano, and a girl. What do they all mean?
Desperation
Stop taking them away from me!
Push the chair 10 times
Afterlife
Suicide
Please come back...
Beat Pleh!
Press H to begin
Complete the new content update