Juggernauts

The Juggernauts are a race of immense cybernetic beings created by the Pfhor, an alien race residing on the planet Tau Ceti. They helped the Pfhor in their conquest of the Milky Way, but they were all destroyed by the militia of the United Earth Space Colony along with most of the Pfhor race.

Types
There are two types of Juggernaut: Major and Minor. A Major Juggernaut is coloured rusty brown, larger, and stronger, while a Minor Juggernaut is dark grey, slightly smaller, and much weaker. However, this does not say much, as any Juggernaut can wipe out an army of humans without getting so much as a scratch on its hard outer shell.

Size
A Minor Juggernaut is approximately 15 metres high and 13 metres wide. It weighs 5.6 tonnes. A Major Juggernaut is 18 metres high and 16 metres wide, weighing about 6.3 tonnes.

Behaviour
Juggernauts are unusually aggressive to any subject. Shortly before their extinction by the hands of the UESC, they rebelled against their Pfhor masters and destroyed half of the Pfhor population.

Weapons
A Juggernaut's arsenal includes two napalm-firing cannons on their arms, and twin missiles from its shoulders.

Armour
Juggernaut armour is vacuum-enabled, therefore the cyborg inside the Juggernaut, which is air-cooled, may waltz into outer space without worry. However, if one Juggernaut is shot down, it will explode in a super-violent explosion, eradicating anything within a 100-metre radius. If shot thus in outer space, it will simply explode thus, however, on planets with active gravity, the Juggernaut will not explode until it hits a solid surface after falling. This is due to the air-locked armour the Juggernaut uses. If about to explode, a loud siren inside the armour will activate.

Trivia

 * The Juggernauts were from the '90s computer game series the Marathon Trilogy.