In the events of rises of giant machines across the globe, Britain was in an urgent state as they need to develop their own behemoth tank in both defenses against invader or furthering military power. First development wasn't a success as Mk. I, although shows promising defense power, lacks in mobility and engine power. After successfully develop on a second research, Mk. II was born.

It was named Colossal due to it's immense size almost as big as T-096 Variant-H. The tank has 3 heavy armaments, 350mm and 150mm auto-cannon on it's turret, and 400mm short-snout howitzer, which also perfectly designed as full on offense. A total crewmen of 8 (a driver, a commander, a gunner, 3 reserve crew, and 2 howitzer gunner/loader).
With a whopping of 446,792 lbs or 223.396 ton, it's speed was able to reach around 190mph~ or 306kmph~. Not the fastest, but among the top 3 toughest frontal defense in Europe.

Made to production, only 50 were produced so far.

Instructions are available

Pros:

Equipped with sensor detection (laser rangefinder, locked-on)

Mounted with 3 heavy armaments (350mm, 150mm, 400mm)

Cons:

Hazard working environment, and difficulty in performing maintenance.

Ammunition are limited.

High profile