Here is the full list of all 37 Psy High achievements.
Left the model citizens
Destroyed the Nexus
Win the Kingsport Scholar Award
Go solo to the prom
Make the Drama Club play a success
Enhanced the Vinculum
Get caught cheating on an exam
Find who stole the iPhone
Win the Kingsport Athlete Award
Be king or queen of the prom
Make a romantic prom-posal
Write a terrible limerick
Stay until the end of the party
Find the tidepool
Get the lead in the Drama Club play
Get a small part in the Drama Club play
Destroy the Drama Club play
Go out with a rebel
Go out with your longtime crush
Go out with your best friend
Go out with a journalist
Go out with three people at once
Have a horrible public breakup
Get a job
Get arrested
Get kicked out
Sold drugs
Saved the model citizens
Drew on the magic of the tidepool
Destroyed the Vinculum
Controlled the Vinculum
Became a model citizen
Pretended to be brainwashed
Gave powers to everyone
Helped elect Governor Pierce
Helped Ms. Clay become principal
Left Kingsport as it was