Flames of War: Mid-War Monsters 1942-1943

From the book back:

This is a supplement for Flames of War the World War II Miniatures Game.

Massive 100-ton super tanks, nearly impenetrable light tanks, incredibly powerful tank-hunters, heavy armoured cars, and vastly improved medium tanks.

Mid-war Monsters allows you and your friends to try out some of the scientists' more interesting and outlandish creations on the Flames of War battlefield...