This Challenge requires you to kill enemies with explosive damage. You will need one of three things for this, either Torgue weapons, rocket launchers, or grenades. Explosive damage is displayed as being yellow.
- Rank 1: Kill 20 enemies with explosive damage
- Rank 2: Kill 75 enemies with explosive damage
- Rank 3: Kill 250 enemies with explosive damage
- Rank 4: Kill 600 enemies with explosive damage
- Rank 5: Kill 1000 enemies with explosive damage