What is easyest way to get this d*mned trophy?
I've got all trophys but not this one. I'm tried to get this like one year. I have W4M on ps2. Is this hardest or longest trophy what is?
Maybe this is a stupid post in here.

Just keep attacking those barrels. That's the only thing you can do.

Here is the answer to your problem in better detail. Enter the landscape code 3651335800. After you do that, select the theme camelot. Then create a scheme, with just the sheep and oil barrels only. Then, on wormpot select Super Animal weapon, Super Random weapon and Double Damage. Select 4 teams with 4 worms. And start the game, with the scheme that you just created. Let go of the sheep, and press the fire button immediately when you let go. The whole landscape will blow up, keep repeating this, and you will eventually get the Barrel buster trophy.

or do that but tweak a dynamite to explode the whole map......it will kill every1 but it will destroy all the barrels