Goliath

From the introduction: During the last days of the ancients many terrible and wondrous war machines were created. One of the most potent was the M3A2 Powell Hovercraft Battle Tank. This devastating war machine incorporated many of the military technologies available to the ancients including artificial intelligence processors, reactive armor, adaptive camouflage, hovercraft lift systems, micro-fusion reactors, magnetic shielding, and pulse laser cannons. The last known existing prototype of this weapons system sat dormant in the Nevada desert of the former United States until about ten years ago. A luckless desert scav who found the control trailer for the tank inadvertently switched the system on, and quickly became the tanks first victim. Popularly known as Goliath, and often described as a "desert demon", the tank has aggressively defended the locale around its control trailer against all comers for the last decade. Many have gone out into the wasteland to confront the demon, but few have returned.