DETROIT MASTER is the platinum trophy in Detroit: Become Human. It's earned when all other trophies have been unlocked.
Upon unlocking this trophy, select users may receive an e-mail from Sony with a code that earns them the following PSN avatar:

TROPHIES
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Platinum - DETROIT MASTER Gold - THIS IS MY STORY | THESE ARE OUR STORIES | SURVIVORS Silver - I'LL BE BACK | HAPPY FAMILY | PARTNERS | BOOKWORM | UNDEFEATED Bronze - DEVIANT LOCATED | SAFE HARBOR | BLOODHOUND | THREE AT JERICHO | SCORCHED EARTH | LIBERATION | MORAL VICTORY | ESCAPE DEATH | MY TURN TO DECIDE | AN ARMY OF ME | MISSION COMPLETE | PRIORITIES | COMPLIANT | ONE OF US | SECRETS | MISSION ACCOMPLISHED | KINSHIP | STAND YOUR GROUND | WE ARE FREE | ESCAPE THE MANOR | DEFEND YOURSELF | SELF-CONTROL | CONFESSION | SHELTER | KNOW YOUR PARTNER | RUN KARA RUN | CATCH IT | SAVE HANK | RUTHLESS | CONFRONTATION | DOUBTS | JERICHO'S HERO | JUST A MACHINE | A SMILE ON HER FACE | WHEN A PLAN COMES TOGETHER | A GLIMPSE OF JERICHO | SEND A MESSAGE | BURN THE PLACE | THANK YOU | NOTHING TO SEE HERE |