The survival of mankind has been threatened after an asteroid hit the Earth. The peaceful planet has been poisoned through the Earth’s core with a devastating element known as Testalunium spreading through the lands. Scientist’s from around the globe has created the most technically advanced vehicle for you to race to the centre of the earth to extract the element. Time is of the essence as you speed through the Earth’s core defense lines. Power Ups and upgrades can assist your mission to save humanity in Age of Speed Underworld.