Mammoth Mk. III

Controversially, GDI command decided to recall existing Mammoth Mk. II units and put a new model, heavily based on the First Tiberium War X-66 Mammoth in production. Conservative critics, including the famous GDI commando Nick "Havoc" Parker, argued against this decision, claiming that it would remove one of GDI's most powerful weapons against the Brotherhood of Nod.

The production of the third generation tank designated Mammoth 27 started in 2039 in Reykjavík, despite protests and controversies from conservative officers and commanders surrounding its introduction.

The tank has been designed with long-range operations in harsh environments in mind. Its design is a return to the basic, four-tread system with a thick, hexagonal armor to match enemy tanks head-on and defeat them in open combat. The tank is initially equipped with dual 150-mm cannons on the turret (which can be later upgraded to railguns) and comes, in the vein of earlier models, with two 4.75-inch missile pods specially designed to attack infantry and aircraft. While on articulated mounts, they are designed to hold four rockets instead of the earlier twelve. Its firepower is enough for it to take an Avatar or an Annihilator Tripod head-on and succeed. Its sheer size means that it can also crush smaller vehicles like the Nod Scorpion tank or Scrin Devourer Tank beneath its treads.

The tank is designed to be the core of GDI assault forces and provide cover for weaker, less armoured units. The performance of the tank in the field has proven that the return to the roots was a good decision for the tank, despite the fact the tank cannot automatically repair itself in the field now.

G-150 Variant
The G-150 Mammoth was a variant of the Mk. III. Unlike the 27, the G-150 is capable of transporting a rifleman squad. It was largely used by the 22nd Infantry Division during the Third Tiberium War, notably in Australia.