Here is the full list of all 10 Paranormal Teens achievements. It takes around 0-1 hour to unlock all of the achievements on Windows.
Didn't Save the Girl
Unlock Tina's Romantic End
Unlock Jose's Happy Ending
Unlock Mike's Happy Ending
Unlock Greg's Happy Ending
Unlock Zaa's Happy Ending
Saying Something Stupid
Unlock Educational Resources
Unlock Sissy's Happy Ending
Unlock Truth