Here is the full list of all 13 Breakneck City trophies - there are 1 silver, 11 gold and 1 platinum.
Unlock all other trophies
Defeat the Foreman.
Collect 12 health tokens.
Beat 50 enemies.
Defeat boss the Hunter.
Beat 12 enemies with a weapon.
Defeat boss Wheeler.
Collect 6 health tokens.
Beat 25 enemies.
Beat 6 enemies with a weapon.
Collect 3 health tokens.
Beat 10 enemies.
Beat 3 enemies with a weapon.