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