Complete the following tasks to unlock PlayStation 4 trophy rewards.

Trophy	How to unlock
Aquatic Laser Show (Bronze)	Activate the Deeplight.
Feast for a Queen (Silver)	Feed the Queen Leviathan.
Gearhead (Gold)	Purchase all upgrades.
Merryn and Goliath (Silver)	Kill a Tremorclaw Crab as Merryn.
Poor Turtles (Bronze)	Defeat the Fomori Boss.
Rest in Pieces (Silver)	Pay your respects to the Watcher and drop a flower on her final resting place.
Sea Saver (Silver)	Destroy the Forbidden City forever.
The Inner Sanctum (Bronze)	Commune with the giant seahorse.
The Last Merrow (Bronze)	Meet the Merrow.
Your Watch is Over (Bronze)	Defeat the Watcher.