Here is the full list of all 8 Detention trophies - there are 4 bronze, 2 silver and 2 gold.
Dial 119 or 110 with the phone.
Picked up all the notes.
Find more than 90% of all observation points.
Waking up in the field.
Watch a movie with Mr. Chang.
Initiate conversation with the other Ray.
Follow Wei back to Greenwood High.
Ray attending the award ceremony.