Here is the full list of all 12 Second Chance Heroes trophies - there are 7 bronze, 4 silver and 1 gold.
Defeat 50 monsters.
Defeat 10,000 monsters.
Defeat every boss.
Defeat each mini-boss.
Beat the first level.
Complete all Mall levels.
Complete all Hobo Colony levels.
Complete all Site Z levels.
Complete all levels.
Collect 1,000 XP.
Collect 100,000 XP.
Play as each Hero.