Here is the full list of all 21 Kill It With Fire trophies - there are 21 bronze.
Kill every type of spider
Find every Battery
Find all Equipment
Find every Upgrade
Find every Tracker Upgrade
Transform a Spiderling hatched from a Queen into a Queen
Get the secret ending
Destroy EVERY dish
Decimate the hedge maze (destroy grass, hedges)
Kill a spider by dropping an anvil on it
Find every Flavor
Beat the game
Kill a spider while Webbed
Complete a level in Tiny Mode
360 no-scope a spider with the Assault Rifle
Smack the piano
Burn the money in the safe
Destroy the gas station
Fire the RPG at the printer
Get the golf ball in the hole
Knock all of the letters off KIWF HQ