One secondary weapon can be active at a time along with one primary weapon. Once the player has purchased a secondary weapon, it does not need to be re-purchased when switching weapons later, but the player must still visit a Motor Forge in order to select it.
- Mine Dropper - Rear-mounted mine dropper Unlocked upon completion of "Pilgrimage of Screams" and costs 80 Fire Tributes.
- Side Burners - Flaming side pipes Unlocked upon completion of "A Number Of The Beasts" and costs 40 Fire Tributes.
- Sub Woofer - Side-mounted speakers that knock back small infantry. Unlocked upon completion of "Doom's Dawn" and costs 160 Fire Tributes.