Mammoth Mk. I

During the First Tiberium War, a few minor changes were made to the original Soviet Mammoth tank prior to its deployment in the field. These changes were the subject of one of the first X Weapons Projects of GDI. The basic design was kept the same: a massive hull powered by an atomic generator with twin 120mm armour piercing cannons and easy-repair ability due to the on-board engineer. Only the mammoth tusk missiles were altered. They were larger and heavier, for an added psychological effect. This, however, meant that the X-66 was more effective against tanks than infantry.

The new generation Mammoth tanks was developed at a secret GDI facility in South Africa, but this facility was discovered by Nod. A sneak attack of infantry and support from artillery managed to destroy the production center and the prototype, delaying the arrival of Mammoth tanks on the battlefield. According to these schematics, the tank was over four meters high and more than 12 meters long.

After the tank was pulled back from regular duty, the Forgotten managed to acquire a few abandoned units and used them during the Second Tiberium War, although by that time, the tank was antiquated and comparatively less powerful. As a response to the Mammoth losing its power, GDI researched and developed its walking successor - the Mammoth Mk. II. Once the walker technology was abandoned GDI would revisit the idea of Mammoth tanks and design the new Mammoth 27.

Behind the scenes
This new tank resembles the old Soviet Mammoth Tank only it now must turn its gun at least 150 to fire missiles at infantry because the original Mammoth does not turn its gun to fire missiles unlike the GDI one.

Also the Mammoth 27 will fie both missiles and 150 guns at the infantry.