It is based on the 2002 film of the same name, in which dragons have annihilated the majority of the human race, and the survivors attempt to fight back using scavenged military hardware.

As a human, the player takes the role of a survivor, in a third-person vehicle-based shooter - tanks and jeeps most notably, which can all carry rockets and machine gun turrets; if the player is touched by fire from a dragon they must find water to douse the flames or they will die.

Hailing from the former United States, The Irregulars are a group of paramilitary dragon slayers and are led by Denton Van Zan.

The Irregulars defend The Fort, an old castle in Northumberland that houses a population of survivors led by Quinn Abercromby.

To prove his theory, Van Zan leads the Irregulars to the ruins of a coastal military base in Dover, now used by the dragons as a nesting ground.

Van Zan confirms his theory and leads the Irregulars to London, intending to kill the sole male dragon, known as The Bull.

The player dragon sneaks into the base from the ocean port, annihilating coastal guns, anti-air defences, warships, and finally the superguns.

With their last line of defence destroyed, the human military presence in England is broken and the remaining survivors scattered.