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