They Go Boom

They Go Boom is a bronze trophy in Resistance 2 that requires 30 kills with the secondary fire function of the Magnum pistol in the Single-Player campaign. This is easily acheivable by using the magnum on the first few levels of the game. Simply fire at an enemy using L1 and then detonate the explosive glycerin round by pressing R2. This will result in a kill on lower difficulties. Rinse and repeat 30 times for the trophy.