Devil's Tongue subterranean flame tank

After the First Tiberium War, Nod commanders reviewed the performance of the Flame Tank, which often had to face GDI armour before it could reach its objective, and in these cases it often could not make it to its destination. To eliminate the danger of encountering enemy armour, an underground version of the tank was developed.

The Subterranean Flame Tank, like its predecessor also known as Devil's Tongue, was a boxy vehicle with two giant horizontal drills located on its front and treads wrapped around the profile of the vehicle. Tanks containing pressurised napalm were completely enclosed within the vehicle, as were the powerful engines required to move it underground. However, the compact design had forced Nod technicians to discard all but the lightest armour plating, rendering it vulnerable to all anti-tank weaponry.

The design worked perfectly, the tank was fast and its twin side-mounted flamethrowers were highly damaging against enemy structures and infantry. Its tunneling abilities have proven to be indispensable assets to the Brotherhood's war effort and GDI infantry soon learnt a new meaning of the word "fear".

The tank's design was effective, but a technological dead-end, as there was little room for improvement or overhaul, so ultimately the tank itself would have to be redesigned. As such, Nod engineers have discarded the vehicle, developing an advanced version of the classic Flame Tank, the Advanced Flame Tank, in its place.