Heavy tank
The Char 2C was one of the largest tanks ever produced. At the start of World War II, France and the Soviet Union were the only countries to have inventories of heavy tanks, such as the Char B1, T-35, and KV-1. The Matilda II was designed under the British infantry tank concept which is similar to the heavy tank having thick armor and weighing more than their other tanks. It’s usually separate because they have less firepower with their cruiser tanks (comparable to mediums) at the time having the same main armament but more machine guns. Later war examples were the German Tiger I and II, as well as the Soviet IS series. Note that "heavy" versus "medium" is more a question of tactical roles than weight; the Panther, for example, was a "medium" tank that outweighed most Allied "heavy" tanks.
Advance Wars: Dual Strike
There are seven new units. Three units operate on land: the Megatank, a Green Earth-developed tank that is the most powerful direct attack unit but has severely limited ammunition for its main cannon and a small movement range; the Piperunner, an indirect-fire vehicle which can only travel on pipelines or bases, but has a large movement and firing range; and the Oozium, a gelatinous blob which can only move one space per turn, but it can destroy any enemy it comes into contact with instantly.