Here is the full list of all 14 Lock's Quest trophies - there are 11 bronze, 2 silver and 1 gold.
Destroy 200 Bronze Clockworks
Destroy 200 Silver Clockworks
Destroy 200 Elite Clockworks
Use all 4 of Lock's Special Attacks in a Single Battle
Defeat Beast without losing a Wall
Kill 10 Clockworks in 10 Seconds
Accumulate 100,000 Source
Complete the game on 'HARD' mode.
Complete the Game on Normal Mode without Dying
During Battle Mode, repair at least 100 unique walls
Have Enemies Activate 1 of each Trap type during a Single Battle
Build a Map with 1 of each Turret, Trap and Helper
Unlock all of Lock's special skills
Survive 10 straight days of Antonia Defense